Index: TODO
===================================================================
diff -u -r6d831cc09c3eea83a17baa5ef05dfeb79b05836e -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- TODO	(.../TODO)	(revision 6d831cc09c3eea83a17baa5ef05dfeb79b05836e)
+++ TODO	(.../TODO)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -3852,8 +3852,11 @@
    - direct subobjects of objects are currently on dispatchable
      when allowmethoddispatch is set. Note, that this could
      be seen as a method-property of the method-name, which
-     could be made "private" as well to avoud such dispatches.
+     could be made "private" as well to avoud such direct dispatches.
 
+- nsf.c: start all error messages with a lower case word for consistency
+  and to follow closer to Tcl's conventions
+
 ========================================================================
 TODO:
 - corollary: for complete configurability of method dispatch, we would
Index: generic/nsf.c
===================================================================
diff -u -r6d831cc09c3eea83a17baa5ef05dfeb79b05836e -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- generic/nsf.c	(.../nsf.c)	(revision 6d831cc09c3eea83a17baa5ef05dfeb79b05836e)
+++ generic/nsf.c	(.../nsf.c)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -4829,8 +4829,8 @@
      */
     Tcl_Obj *bootstrapObj = Tcl_GetVar2Ex(interp, "::nsf::bootstrap", NULL, TCL_GLOBAL_ONLY);
     if (bootstrapObj == NULL) {
-      result = NsfPrintError(interp, "Method '%s' of %s cannot be overwritten. "
-			     "Derive e.g. a sub-class!", methodName, ObjectName(object));
+      result = NsfPrintError(interp, "method '%s' of %s cannot be overwritten; "
+			     "derive e.g. a sub-class!", methodName, ObjectName(object));
     } else {
       result = TCL_OK;
     }
@@ -5717,12 +5717,12 @@
     if (acResult == TCL_ERROR) {
       Tcl_Obj *sr = Tcl_GetObjResult(interp);
       INCR_REF_COUNT(sr);	
-      NsfPrintError(interp, "Error in Assertion: {%s} in proc '%s'\n%s",
+      NsfPrintError(interp, "error in Assertion: {%s} in proc '%s'\n%s",
 		    ObjStr(checkFailed->content), methodName, ObjStr(sr));
       DECR_REF_COUNT(sr);
       return TCL_ERROR;
     }
-    return NsfPrintError(interp, "Assertion failed check: {%s} in proc '%s'",
+    return NsfPrintError(interp, "assertion failed check: {%s} in proc '%s'",
 			 ObjStr(checkFailed->content), methodName);
   }
 
@@ -5830,7 +5830,7 @@
     }
   }
   if (opt->checkoptions == CHECK_NONE && ocArgs>0) {
-    return NsfPrintError(interp, "Unknown check option in command '%s' check %s, ",
+    return NsfPrintError(interp, "unknown check option in command '%s' check %s, ",
 			 "valid: all pre post object-invar class-invar",
 			 ObjectName(object), ObjStr(arg));
   }
@@ -7389,7 +7389,7 @@
     } else if (result == TCL_ERROR) {
       Tcl_Obj *sr = Tcl_GetObjResult(interp);
       INCR_REF_COUNT(sr);
-      NsfPrintError(interp, "Guard Error: '%s'\n%s", ObjStr(guardObj), ObjStr(sr));
+      NsfPrintError(interp, "Guard error: '%s'\n%s", ObjStr(guardObj), ObjStr(sr));
       DECR_REF_COUNT(sr);
       return TCL_ERROR;
     }
@@ -9475,7 +9475,7 @@
     }
     
     NsfCleanupObject(invokedObject, "alias-delete1");
-    return NsfPrintError(interp, "Trying to dispatch deleted object via method '%s'",
+    return NsfPrintError(interp, "trying to dispatch deleted object via method '%s'",
 			 methodName);
   }
   
@@ -10141,7 +10141,7 @@
     NsfCallStackContent *cscPtr1 = CallStackGetTopFrame0(interp);
 
     if (unlikely(cscPtr1 == NULL)) {
-      return NsfPrintError(interp, "Flag '-local' only allowed when called from a method body");
+      return NsfPrintError(interp, "flag '-local' only allowed when called from a method body");
     }
     if (cscPtr1->cl) {
       cmd = FindMethod(cscPtr1->cl->nsPtr, methodName);
@@ -10948,7 +10948,7 @@
 	 * In order to flag a warning, we set the error message and
 	 * return TCL_CONTINUE
 	 */
-	(void)NsfPrintError(interp, "Value '%s' of parameter '%s' could be a non-positional argument",
+	(void)NsfPrintError(interp, "value '%s' of parameter '%s' could be a non-positional argument",
 		      value, pPtr->name);
 	result = TCL_CONTINUE;
       }
@@ -11441,7 +11441,7 @@
 ParamOptionSetConverter(Tcl_Interp *interp, Nsf_Param *paramPtr,
                         CONST char *typeName, Nsf_TypeConverter *converter) {
   if (paramPtr->converter) {
-    return NsfPrintError(interp, "Refuse to redefine parameter type of '%s' from type '%s' to type '%s'",
+    return NsfPrintError(interp, "refuse to redefine parameter type of '%s' from type '%s' to type '%s'",
 			 paramPtr->name, paramPtr->type, typeName);
   }
   paramPtr->converter = converter;
@@ -11527,27 +11527,27 @@
 
   } else if (strncmp(option, "noleadingdash", 13) == 0) {
     if (*paramPtr->name == '-') {
-      return NsfPrintError(interp, "Parameter option 'noleadingdash' only allowed for positional parameters");
+      return NsfPrintError(interp, "parameter option 'noleadingdash' only allowed for positional parameters");
     }
     paramPtr->flags |= NSF_ARG_NOLEADINGDASH;
 
   } else if (strncmp(option, "noconfig", 8) == 0) {
     if (disallowedOptions != NSF_DISALLOWED_ARG_OBJECT_PARAMETER) {
-      return NsfPrintError(interp, "Parameter option 'noconfig' only allowed for object parameters");
+      return NsfPrintError(interp, "parameter option 'noconfig' only allowed for object parameters");
     }
     paramPtr->flags |= NSF_ARG_NOCONFIG;
 
   } else if (strncmp(option, "args", 4) == 0) {
     if ((paramPtr->flags & NSF_ARG_ALIAS) == 0) {
-      return NsfPrintError(interp, "Parameter option \"args\" only allowed for parameter type \"alias\"");
+      return NsfPrintError(interp, "parameter option \"args\" only allowed for parameter type \"alias\"");
     }
     result = ParamOptionSetConverter(interp, paramPtr, "args", ConvertToNothing);
 
   } else if (optionLength >= 4 && strncmp(option, "arg=", 4) == 0) {
     if (paramPtr->converter != ConvertViaCmd) {
       fprintf(stderr, "type %s flags %.6x\n", paramPtr->type, paramPtr->flags);
       return NsfPrintError(interp,
-			   "Parameter option 'arg=' only allowed for user-defined converter");
+			   "parameter option 'arg=' only allowed for user-defined converter");
     }
     if (paramPtr->converterArg) {DECR_REF_COUNT(paramPtr->converterArg);}
     paramPtr->converterArg = Tcl_NewStringObj(option + 4, optionLength - 4);
@@ -11560,7 +11560,7 @@
 			   "type \"switch\" only allowed for non-positional arguments",
 			   paramPtr->name);
     } else if (paramPtr->flags & NSF_ARG_METHOD_INVOCATION) {
-      return NsfPrintError(interp, "Parameter invocation types cannot be used with option 'switch'");
+      return NsfPrintError(interp, "parameter invocation types cannot be used with option 'switch'");
     }
     result = ParamOptionSetConverter(interp, paramPtr, "switch", Nsf_ConvertToSwitch);
     paramPtr->flags |= NSF_ARG_SWITCH;
@@ -11604,7 +11604,7 @@
   } else if (optionLength >= 6 && strncmp(option, "type=", 5) == 0) {
     if (paramPtr->converter != Nsf_ConvertToObject &&
         paramPtr->converter != Nsf_ConvertToClass)
-	return NsfPrintError(interp, "Parameter option 'type=' only allowed for parameter types 'object' and 'class'");
+	return NsfPrintError(interp, "parameter option 'type=' only allowed for parameter types 'object' and 'class'");
     if (paramPtr->converterArg) {DECR_REF_COUNT(paramPtr->converterArg);}
     paramPtr->converterArg = Tcl_NewStringObj(option + 5, optionLength - 5);
     INCR_REF_COUNT(paramPtr->converterArg);
@@ -11616,7 +11616,7 @@
 
   } else if (optionLength >= 6 && strncmp(option, "method=", 7) == 0) {
     if ((paramPtr->flags & (NSF_ARG_ALIAS|NSF_ARG_FORWARD)) == 0) {
-      return NsfPrintError(interp, "Parameter option 'method=' only allowed for parameter types 'alias' and 'forward'");
+      return NsfPrintError(interp, "parameter option 'method=' only allowed for parameter types 'alias' and 'forward'");
     }
     if (paramPtr->method) {DECR_REF_COUNT(paramPtr->method);}
     paramPtr->method = Tcl_NewStringObj(option + 7, optionLength - 7);
@@ -11629,7 +11629,7 @@
     Tcl_DStringAppend(dsPtr, option, optionLength);
 
     if (paramPtr->converter) {
-      NsfPrintError(interp, "Parameter option '%s' unknown for parameter type '%s'",
+      NsfPrintError(interp, "parameter option '%s' unknown for parameter type '%s'",
 		    Tcl_DStringValue(dsPtr), paramPtr->type);
       Tcl_DStringFree(dsPtr);
       return TCL_ERROR;
@@ -11684,17 +11684,17 @@
   }
 
   if ((paramPtr->flags & disallowedOptions)) {
-    return NsfPrintError(interp, "Parameter option '%s' not allowed", option);
+    return NsfPrintError(interp, "parameter option '%s' not allowed", option);
   }
 
   if (unlikely((paramPtr->flags & NSF_ARG_METHOD_INVOCATION) && (paramPtr->flags & NSF_ARG_NOCONFIG))) {
-    return NsfPrintError(interp, "Option 'noconfig' cannot used together with this type of object parameter");
+    return NsfPrintError(interp, "option 'noconfig' cannot used together with this type of object parameter");
   } else if (unlikely((paramPtr->flags & (NSF_ARG_ALIAS|NSF_ARG_FORWARD)) == (NSF_ARG_ALIAS|NSF_ARG_FORWARD))) {
-    return NsfPrintError(interp, "Parameter types 'alias' and 'forward' cannot be used together");
+    return NsfPrintError(interp, "parameter types 'alias' and 'forward' cannot be used together");
   } else if (unlikely((paramPtr->flags & (NSF_ARG_ALIAS|NSF_ARG_INITCMD)) == (NSF_ARG_ALIAS|NSF_ARG_INITCMD))) {
-    return NsfPrintError(interp, "Parameter types 'alias' and 'initcmd' cannot be used together");
+    return NsfPrintError(interp, "parameter types 'alias' and 'initcmd' cannot be used together");
   } else if (unlikely((paramPtr->flags & (NSF_ARG_FORWARD|NSF_ARG_INITCMD)) == (NSF_ARG_FORWARD|NSF_ARG_INITCMD))) {
-    return NsfPrintError(interp, "Parameter types 'forward' and 'initcmd' cannot be used together");
+    return NsfPrintError(interp, "parameter types 'forward' and 'initcmd' cannot be used together");
   }
 
   return result;
@@ -11845,7 +11845,7 @@
   } else if (paramPtr->converter == ConvertToNothing) {
     if (paramPtr->flags & (NSF_ARG_ALLOW_EMPTY|NSF_ARG_MULTIVALUED)) {
       NsfPrintError(interp,
-		    "Multiplicity settings for variable argument parameter \"%s\" not allowed",
+		    "multiplicity settings for variable argument parameter \"%s\" not allowed",
 		    paramPtr->name);
       goto param_error;
     }
@@ -16518,7 +16518,7 @@
 		if (procNameObj->refCount != refcountBefore) {
 		  pcPtr->objc = nrParams ;
 		  /*fprintf(stderr, "trigger error pcPtr->objc %d\n", pcPtr->objc);*/
-		  return NsfPrintError(interp, "Unknown handler for '%s' must not alter definition",
+		  return NsfPrintError(interp, "unknown handler for '%s' must not alter definition",
 				       ObjStr(argumentObj));
 		}
 #endif
@@ -16563,7 +16563,7 @@
 	o++;
 	if (unlikely(o >= objc)) {
 	  /* we expect an argument, but we are already at the end of the argument list */
-	  return NsfPrintError(interp, "Value for parameter '%s' expected", pPtr->name);
+	  return NsfPrintError(interp, "value for parameter '%s' expected", pPtr->name);
 	}
 	assert(valueObj == NULL);
 	valueObj = objv[o];
@@ -17966,7 +17966,7 @@
   /*fprintf(stderr, "aliasGet methodName '%s' returns %p\n", methodName, obj);*/
   Tcl_DStringFree(dsPtr);
   if (obj == NULL && leaveError) {
-    NsfPrintError(interp, "Could not obtain alias definition for %s %s.",
+    NsfPrintError(interp, "could not obtain alias definition for %s %s.",
 		  ObjStr(cmdName), methodName);
   }
   return obj;
@@ -18647,7 +18647,7 @@
      */
     slave = Tcl_GetSlave(interp, ObjStr(objv[2]));
     if (!slave) {
-      return NsfPrintError(interp, "Creation of slave interpreter failed");
+      return NsfPrintError(interp, "creation of slave interpreter failed");
     }
     if (Nsf_Init(slave) == TCL_ERROR) {
       return TCL_ERROR;
@@ -19101,7 +19101,7 @@
 
 
   if (unlikely(cmd == NULL)) {
-    return NsfPrintError(interp, "Cannot lookup %s method '%s' for %s",
+    return NsfPrintError(interp, "cannot lookup %s method '%s' for %s",
 			 cl == 0 ? "object " : "",
 			 methodName, ObjectName(object));
   }
@@ -19183,7 +19183,7 @@
       Tcl_Obj **objPtr;
 
       if (valueObj == NULL && methodproperty == MethodpropertySlotobjIdx) {
-	return NsfPrintError(interp, "Option 'slotobj' of method '%s' requires argument",
+	return NsfPrintError(interp, "option 'slotobj' of method '%s' requires argument",
 			     methodName);
       }
 
@@ -19590,7 +19590,7 @@
 
       if (oc % 2) {
         ObjectSystemFree(interp, osPtr);
-        return NsfPrintError(interp, "System methods must be provided as pairs");
+        return NsfPrintError(interp, "system methods must be provided as pairs");
       }
       for (i=0; i<oc; i += 2) {
 	Tcl_Obj *arg, **arg_ov;
@@ -19622,7 +19622,7 @@
       }
     } else {
       ObjectSystemFree(interp, osPtr);
-      return NsfPrintError(interp, "Provided system methods are not a proper list");
+      return NsfPrintError(interp, "provided system methods are not a proper list");
     }
   }
   /*
@@ -19640,7 +19640,7 @@
     if (theobj) PrimitiveCDestroy(theobj);
 
     ObjectSystemFree(interp, osPtr);
-    return NsfPrintError(interp, "Creation of object system failed");
+    return NsfPrintError(interp, "creation of object system failed");
   }
 
   theobj->osPtr = osPtr;
@@ -19916,7 +19916,7 @@
               DECR_REF_COUNT(newFullCmdName);
               DECR_REF_COUNT(oldFullCmdName);
               DECR_REF_COUNT(arglistObj);
-              return NsfPrintError(interp, "No object for assertions");
+              return NsfPrintError(interp, "no object for assertions");
             }
 
             DSTRING_INIT(dsPtr);
@@ -20448,7 +20448,7 @@
       CONST char *procName = Tcl_GetCommandName(interp, cscPtr->cmdPtr);
       Tcl_SetResult(interp, (char *)procName, TCL_VOLATILE);
     } else {
-      return NsfPrintError(interp,  "Can't find proc");
+      return NsfPrintError(interp,  "can't find proc");
     }
     break;
 
@@ -21020,7 +21020,7 @@
 
     return TCL_OK;
   }
-  return NsfPrintError(interp, "Autoname failed. Probably format string (with %%) was not well-formed");
+  return NsfPrintError(interp, "autoname failed. Probably format string (with %%) was not well-formed");
 }
 
 /*
@@ -21462,7 +21462,7 @@
    */ 
   if (unlikely(IsBaseClass(object))) {
     if (RUNTIME_STATE(interp)->exitHandlerDestroyRound != NSF_EXITHANDLER_ON_SOFT_DESTROY) {
-      return NsfPrintError(interp, "Cannot destroy base class %s", ObjectName(object));
+      return NsfPrintError(interp, "cannot destroy base class %s", ObjectName(object));
     }
   }
 
@@ -21551,7 +21551,7 @@
     }
   }
 
-  return NsfPrintError(interp, "Filterguard: can't find filter %s on %s",
+  return NsfPrintError(interp, "filterguard: can't find filter %s on %s",
 		       filter, ObjectName(object));
 }
 
@@ -21610,7 +21610,7 @@
     }
   }
 
-  return NsfPrintError(interp, "Mixinguard: can't find mixin %s on %s",
+  return NsfPrintError(interp, "mixinguard: can't find mixin %s on %s",
 		       ObjStr(mixin), ObjectName(object));
 }
 
@@ -21854,8 +21854,8 @@
   callFrameContext ctx = {0, NULL, NULL};
 
   if (unlikely(RUNTIME_STATE(interp)->exitHandlerDestroyRound != NSF_EXITHANDLER_OFF)) {
-    fprintf(stderr, "### Can't make objects volatile during shutdown\n");
-    return NsfPrintError(interp, "Can't make objects volatile during shutdown");
+    fprintf(stderr, "### can't make objects volatile during shutdown\n");
+    return NsfPrintError(interp, "can't make objects volatile during shutdown");
   }
 
   CallStackUseActiveFrame(interp, &ctx);
@@ -21906,7 +21906,7 @@
 
   /*fprintf(stderr, " **** class '%s' wants to alloc '%s'\n", ClassName(cl), nameString);*/
   if (unlikely(NSCheckColons(nameString, 0) == 0)) {
-    return NsfPrintError(interp, "Cannot allocate object - illegal name '%s'", nameString);
+    return NsfPrintError(interp, "cannot allocate object - illegal name '%s'", nameString);
   }
 
   if (IsMetaClass(interp, cl, 1) == 0) {
@@ -21953,7 +21953,7 @@
 
   /*fprintf(stderr, " **** class '%s' wants to alloc '%s'\n", ClassName(cl), nameString);*/
   if (!NSCheckColons(nameString, 0)) {
-    return NsfPrintError(interp, "Cannot allocate object - illegal name '%s'", nameString);
+    return NsfPrintError(interp, "cannot allocate object - illegal name '%s'", nameString);
   }
 
   /*
@@ -22048,7 +22048,7 @@
    * Provide protection against recreation if base classes.
    */ 
   if (unlikely(newObject && unlikely(IsBaseClass(newObject)))) {
-    result = NsfPrintError(interp, "Cannot recreate base class %s", ObjectName(newObject));
+    result = NsfPrintError(interp, "cannot recreate base class %s", ObjectName(newObject));
     goto create_method_exit;
   }
 
@@ -22140,7 +22140,7 @@
   NsfObject *object;
 
   if (GetObjectFromObj(interp, obj, &object) != TCL_OK) {
-    return NsfPrintError(interp, "Can't destroy object %s that does not exist",
+    return NsfPrintError(interp, "can't destroy object %s that does not exist",
 			 ObjStr(obj));
   }
 
Index: generic/nsfError.c
===================================================================
diff -u -r86057e0dc49bf59f550ed1b74e11a0e13198d0a8 -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- generic/nsfError.c	(.../nsfError.c)	(revision 86057e0dc49bf59f550ed1b74e11a0e13198d0a8)
+++ generic/nsfError.c	(.../nsfError.c)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -262,7 +262,7 @@
 			   Nsf_Object *object, Nsf_Param CONST *paramPtr, Tcl_Obj *procNameObj) {
   Tcl_DString ds, *dsPtr = &ds;
   DSTRING_INIT(dsPtr);
-  Tcl_DStringAppend(dsPtr, "Invalid argument '", -1);
+  Tcl_DStringAppend(dsPtr, "invalid argument '", -1);
   Tcl_DStringAppend(dsPtr, argumentString, -1);
   Tcl_DStringAppend(dsPtr, "', maybe too many arguments;", -1);
   NsfArgumentError(interp, Tcl_DStringValue(dsPtr), paramPtr,
@@ -298,7 +298,7 @@
   Nsf_Param CONST *pPtr;
 
   DSTRING_INIT(dsPtr);
-  Tcl_DStringAppend(dsPtr, "Invalid non-positional argument '", -1);
+  Tcl_DStringAppend(dsPtr, "invalid non-positional argument '", -1);
   Tcl_DStringAppend(dsPtr, argumentString, -1);
   Tcl_DStringAppend(dsPtr, "', valid are : ", -1);
   for (pPtr = currentParamPtr; pPtr->name && *pPtr->name == '-'; pPtr ++) {
@@ -337,7 +337,7 @@
 NsfDispatchClientDataError(Tcl_Interp *interp, ClientData clientData, 
 			   CONST char *what, CONST char *methodName) {
   if (clientData) {
-    return NsfPrintError(interp, "Method %s not dispatched on valid %s",
+    return NsfPrintError(interp, "method %s not dispatched on valid %s",
 			 methodName, what);  
   } else {
     return NsfNoCurrentObjectError(interp, methodName);
@@ -362,7 +362,7 @@
  */
 extern int
 NsfNoCurrentObjectError(Tcl_Interp *interp, CONST char *what) {
-  return NsfPrintError(interp, "No current object; %s called outside the context of a Next Scripting method",
+  return NsfPrintError(interp, "no current object; %s called outside the context of a Next Scripting method",
 		       what ? what : "command");
 }
 
Index: library/xotcl/tests/slottest.xotcl
===================================================================
diff -u -r9a0b8bb0992be0561d8187c275fc1d9b7e0bbcd0 -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- library/xotcl/tests/slottest.xotcl	(.../slottest.xotcl)	(revision 9a0b8bb0992be0561d8187c275fc1d9b7e0bbcd0)
+++ library/xotcl/tests/slottest.xotcl	(.../slottest.xotcl)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -376,7 +376,7 @@
   C instproc init args {set ::_ $args}
 
   set ::_ ""
-  ? {C create c2 -y 1 -x} {Value for parameter '-x' expected}
+  ? {C create c2 -y 1 -x} {value for parameter '-x' expected}
   ? {set ::_} ""
   ? {c2 x} {can't read "x": no such variable}
   ? {C create c3 -y 1 -x 0} "::c3"
Index: library/xotcl/tests/testx.xotcl
===================================================================
diff -u -r9a0b8bb0992be0561d8187c275fc1d9b7e0bbcd0 -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- library/xotcl/tests/testx.xotcl	(.../testx.xotcl)	(revision 9a0b8bb0992be0561d8187c275fc1d9b7e0bbcd0)
+++ library/xotcl/tests/testx.xotcl	(.../testx.xotcl)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -261,13 +261,13 @@
     a set x 1
     a check all
   }
-  ::errorCheck $err {Assertion failed check: {$x == 1} in proc 'xTo2'} \
+  ::errorCheck $err {assertion failed check: {$x == 1} in proc 'xTo2'} \
     "inheritance a xTo2"
 
   if {![catch {a yTo2} err]} {
     set err "ok"
   }
-  ::errorCheck $err {Assertion failed check: {$y == 1} in proc 'yTo2'} \
+  ::errorCheck $err {assertion failed check: {$y == 1} in proc 'yTo2'} \
     "inheritance a yTo2"
 
   Class B -superclass A
@@ -280,13 +280,13 @@
     b set x 1
     b check all
   }
-  ::errorCheck $err {Assertion failed check: {$x == 1} in proc 'xTo2'} \
+  ::errorCheck $err {assertion failed check: {$x == 1} in proc 'xTo2'} \
     "inheritance b xTo2"
 
   if {![catch {b yTo2} err]} {
     set err "ok"
   }
- ::errorCheck $err {Assertion failed check: {$y == 1} in proc 'yTo2'} \
+ ::errorCheck $err {assertion failed check: {$y == 1} in proc 'yTo2'} \
 					 "inheritance b yTo2"
  
  a destroy     
@@ -4028,7 +4028,7 @@
     o y 4 56 5
   } m
   errorCheck $m \
-      {Invalid argument '5', maybe too many arguments; should be "::o y ?-x value? ?-a value? a b"} \
+      {invalid argument '5', maybe too many arguments; should be "::o y ?-x value? ?-a value? a b"} \
       "wrong \# check 1"
 
   catch {
@@ -4115,7 +4115,7 @@
   o foo
   o foo -foo 0
   catch {o foo -foo} msg
-  errorCheck $msg "Value for parameter '-foo' expected" "Empty non-pos arg"
+  errorCheck $msg "value for parameter '-foo' expected" "Empty non-pos arg"
   
   Object oa
   oa proc foo {{-a A} b} {
Index: tests/alias.test
===================================================================
diff -u -r7413d266916a491ff674489513351c89987366d7 -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- tests/alias.test	(.../alias.test)	(revision 7413d266916a491ff674489513351c89987366d7)
+++ tests/alias.test	(.../alias.test)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -449,10 +449,10 @@
 ? {c FOO} {target "::foo" of alias FOO apparently disappeared}
 ? {C info method definition FOO} "::C public alias FOO ::foo"
 unset ::nsf::alias(::C,FOO,0)
-? {c FOO} {Could not obtain alias definition for ::C FOO.}
+? {c FOO} {could not obtain alias definition for ::C FOO.}
 ? {c FOO2} {target "::foo" of alias FOO2 apparently disappeared}
 rename ::foo2 ::foo
-? {c FOO} {Could not obtain alias definition for ::C FOO.}
+? {c FOO} {could not obtain alias definition for ::C FOO.}
 ? {c FOO2} {::c->FOO2}
 
 #
Index: tests/contains.test
===================================================================
diff -u -r5371aaaf333c92616a8baf6e521df386909b876d -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- tests/contains.test	(.../contains.test)	(revision 5371aaaf333c92616a8baf6e521df386909b876d)
+++ tests/contains.test	(.../contains.test)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -89,7 +89,7 @@
 C public method foo {{-new 0} name value} { return $value}
 catch {c1 foo -name a b} errMsg
 ? {set errMsg} \
-    {Invalid argument 'b', maybe too many arguments; should be "::c1 foo ?-new value? name value"}
+    {invalid argument 'b', maybe too many arguments; should be "::c1 foo ?-new value? name value"}
 
 # Test resolving of implicit namespaces in relationcmds (here
 # superclass) in the nx namespace.
Index: tests/destroy.test
===================================================================
diff -u -r6d831cc09c3eea83a17baa5ef05dfeb79b05836e -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- tests/destroy.test	(.../destroy.test)	(revision 6d831cc09c3eea83a17baa5ef05dfeb79b05836e)
+++ tests/destroy.test	(.../destroy.test)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -886,7 +886,7 @@
   ? {$i eval {info exists ::MSG}} 0
   $i eval {::nsf::finalize -keepvars}
   ? {$i eval {info exists ::MSG}} 1
-  ? {$i eval {set ::MSG}} [list "Cannot destroy base class ::nx::Object" "Cannot destroy base class ::nx::Class"]
+  ? {$i eval {set ::MSG}} [list "cannot destroy base class ::nx::Object" "cannot destroy base class ::nx::Class"]
 
   interp delete $i
   unset i
Index: tests/disposition.test
===================================================================
diff -u -r7413d266916a491ff674489513351c89987366d7 -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- tests/disposition.test	(.../disposition.test)	(revision 7413d266916a491ff674489513351c89987366d7)
+++ tests/disposition.test	(.../disposition.test)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -42,7 +42,7 @@
     #
     # Restricted to object parameters only?
     #
-    set msg "Parameter option '$paramType' not allowed"
+    set msg "parameter option '$paramType' not allowed"
     ? [list C method m1 -foo:$paramType {;}] $msg
     ? [list C method m1 foo:$paramType {;}] $msg
     
@@ -194,9 +194,9 @@
 
   C setObjectParams {{-single-np:alias}}
   ? {[C new -single-np [list -x]] eval {set :single-np}} \
-      "Value for parameter '-x' expected"
+      "value for parameter '-x' expected"
   ? {[C new -single-np [list -x X]] eval {set :single-np}} \
-      "Invalid non-positional argument '-x X', valid are : -x;
+      "invalid non-positional argument '-x X', valid are : -x;
  should be \"::__%&singleton single-np -x\""
 
   #
@@ -275,7 +275,7 @@
   array set script {alias "method=baz" forward "method=%self %method"}
   foreach disposition [list alias forward] {
     C setObjectParams [list [list -foo:$disposition,switch]]
-    ? {C new} "Parameter invocation types cannot be used with option 'switch'" \
+    ? {C new} "parameter invocation types cannot be used with option 'switch'" \
 	"switch not allowed for $disposition"
     
     C setObjectParams [list [list -baz:$disposition,mytype,$script($disposition)]]
@@ -291,33 +291,33 @@
 	"disposition $disposition, unknown user defined type - just a warning"
 
     C setObjectParams [list [list -foo:$disposition,type=::C]]
-    ? {C new} "Parameter option 'type=' only allowed for parameter types 'object' and 'class'"
+    ? {C new} "parameter option 'type=' only allowed for parameter types 'object' and 'class'"
 
     #
     # The 'arg=...' option should not be used, consider using 'method=...'
     #
     C setObjectParams [list [list -foo:$disposition,arg=BOOM]]
-    ? {C new} "Parameter option 'arg=' only allowed for user-defined converter"
+    ? {C new} "parameter option 'arg=' only allowed for user-defined converter"
 
   }
 
   #
   # The option 'method=...' applies to disposition types only
   #
   C setObjectParams [list [list -foo:initcmd,method=BOOM]]
-  ? {C new} "Parameter option 'method=' only allowed for parameter types 'alias' and 'forward'"
+  ? {C new} "parameter option 'method=' only allowed for parameter types 'alias' and 'forward'"
   
   C setObjectParams [list [list -foo:alias,forward]]
-  ? {C new} "Parameter types 'alias' and 'forward' cannot be used together"
+  ? {C new} "parameter types 'alias' and 'forward' cannot be used together"
 
   C setObjectParams [list [list -foo:forward,alias]]
-  ? {C new} "Parameter types 'alias' and 'forward' cannot be used together"
+  ? {C new} "parameter types 'alias' and 'forward' cannot be used together"
 
   C setObjectParams [list [list -foo:alias,initcmd]]
-  ? {C new} "Parameter types 'alias' and 'initcmd' cannot be used together"
+  ? {C new} "parameter types 'alias' and 'initcmd' cannot be used together"
 
   C setObjectParams [list [list -foo:forward,initcmd]]
-  ? {C new} "Parameter types 'forward' and 'initcmd' cannot be used together"
+  ? {C new} "parameter types 'forward' and 'initcmd' cannot be used together"
 }
 
 nx::Test case dispo-multiplicities {
@@ -849,21 +849,21 @@
   # don't allow other types for parameter option "args"
   #
   C setObjectParams {{args:alias,int,method=Residualargs,args {hello world}}}
-  ? {C create c1} {Refuse to redefine parameter type of 'args' from type 'integer' to type 'args'}
+  ? {C create c1} {refuse to redefine parameter type of 'args' from type 'integer' to type 'args'}
   ? {c1 eval {info exists :args}} 0
   C setObjectParams {{args:int,alias,method=Residualargs,args {hello world}}}
-  ? {C create c1} {Refuse to redefine parameter type of 'args' from type 'integer' to type 'args'}
+  ? {C create c1} {refuse to redefine parameter type of 'args' from type 'integer' to type 'args'}
   ? {c1 eval {info exists :args}} 0
 
   #
   # don't allow multiplicity settings for parameter option "args"
   #
   C setObjectParams {{args:alias,method=Residualargs,0..n,args {hello world}}}
-  ? {C create c1} {Multiplicity settings for variable argument parameter "args" not allowed}
+  ? {C create c1} {multiplicity settings for variable argument parameter "args" not allowed}
   ? {c1 eval {info exists :args}} 0
 
   C setObjectParams {args:alias,method=Residualargs,args,1..n}
-  ? {C create c1} {Multiplicity settings for variable argument parameter "args" not allowed}
+  ? {C create c1} {multiplicity settings for variable argument parameter "args" not allowed}
   ? {c1 eval {info exists :args}} 0
   
   #
@@ -1293,7 +1293,7 @@
   # ISSUE: positional objparam + alias + noarg -> what's the point?
   # noarg & ?z? are irritating, ?z? should not be printed!
   #
-  ? {T create t XXX} "Invalid argument 'XXX', maybe too many arguments; should be \"::t configure ?z?\""
+  ? {T create t XXX} "invalid argument 'XXX', maybe too many arguments; should be \"::t configure ?z?\""
 
   ::obj mixin {}
   T setObjectParams [list z:alias]
Index: tests/info-method.test
===================================================================
diff -u -r6d831cc09c3eea83a17baa5ef05dfeb79b05836e -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- tests/info-method.test	(.../info-method.test)	(revision 6d831cc09c3eea83a17baa5ef05dfeb79b05836e)
+++ tests/info-method.test	(.../info-method.test)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -1211,5 +1211,5 @@
 # Test error messages within an ensemble call
 #
 nx::Test case error-in-ensemble {
-  ? {nx::Object info method definition foo 1} {Invalid argument '1', maybe too many arguments; should be "::nx::Object info method args|body|definition|exists|registrationhandle|definitionhandle|handle|origin|parameter|parametersyntax|type|precondition|postcondition|submethods|returns name"}
+  ? {nx::Object info method definition foo 1} {invalid argument '1', maybe too many arguments; should be "::nx::Object info method args|body|definition|exists|registrationhandle|definitionhandle|handle|origin|parameter|parametersyntax|type|precondition|postcondition|submethods|returns name"}
 }
\ No newline at end of file
Index: tests/method-parameter.test
===================================================================
diff -u -rd62bca12731d1c7a1a5cf63f950275852c5b05a2 -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- tests/method-parameter.test	(.../method-parameter.test)	(revision d62bca12731d1c7a1a5cf63f950275852c5b05a2)
+++ tests/method-parameter.test	(.../method-parameter.test)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -11,18 +11,18 @@
   ? {p0 -x} {wrong # args: should be "p0"}
 
   ? {p1} 0
-  ? {p1 -x} {Value for parameter '-x' expected}
+  ? {p1 -x} {value for parameter '-x' expected}
   ? {p1 -x 1} 1
-  ? {p1 -x 1 2} {Invalid argument '2', maybe too many arguments; should be "p1 ?-x value?"}
-  ? {p1 -x 1 -y} {Invalid non-positional argument '-y', valid are : -x;
+  ? {p1 -x 1 2} {invalid argument '2', maybe too many arguments; should be "p1 ?-x value?"}
+  ? {p1 -x 1 -y} {invalid non-positional argument '-y', valid are : -x;
  should be "p1 ?-x value?"}
-  ? {p1 a} {Invalid argument 'a', maybe too many arguments; should be "p1 ?-x value?"}
-  ? {p1 a -x} {Invalid argument 'a', maybe too many arguments; should be "p1 ?-x value?"}
+  ? {p1 a} {invalid argument 'a', maybe too many arguments; should be "p1 ?-x value?"}
+  ? {p1 a -x} {invalid argument 'a', maybe too many arguments; should be "p1 ?-x value?"}
 
   ? {p1 --} 0
-  ? {p1 -y} {Invalid non-positional argument '-y', valid are : -x;
+  ? {p1 -y} {invalid non-positional argument '-y', valid are : -x;
  should be "p1 ?-x value?"}
-  ? {p1 -y --} {Invalid non-positional argument '-y', valid are : -x;
+  ? {p1 -y --} {invalid non-positional argument '-y', valid are : -x;
  should be "p1 ?-x value?"}
 
   #
@@ -49,15 +49,15 @@
   ? {p2c -x -y} {1 {}} ;# "-y" is the value of "x"; TODO: noleadindash currently only for posargs
 
   ? {p2a -x 1 -y} {1 -y}
-  ? {p2b -x 1 -y} {Invalid non-positional argument '-y', valid are : -x;
+  ? {p2b -x 1 -y} {invalid non-positional argument '-y', valid are : -x;
  should be "p2b ?-x value? ?arg ...?"}
-  ? {p2c -x 1 -y} {Invalid non-positional argument '-y', valid are : -x;
+  ? {p2c -x 1 -y} {invalid non-positional argument '-y', valid are : -x;
  should be "p2c ?-x value? ?arg ...?"}
 
   nsf::proc p3a {a -x -y b:noleadingdash -z} {return [list $a [info exists x] [info exists y] $b]}
 
   ? {p3a 100 -x 1 -y 1 200} {100 1 1 200}
-  ? {p3a 100 -xx 1 -y 1 200} {Invalid non-positional argument '-xx', valid are : -x, -y;
+  ? {p3a 100 -xx 1 -y 1 200} {invalid non-positional argument '-xx', valid are : -x, -y;
  should be "p3a a ?-x value? ?-y value? b ?-z value?"}  
 }
 
@@ -67,15 +67,15 @@
     :public method p1 {-x} {return [list [info exists x]]}
     :create c1
   }
-  ? {c1 p1 -x 1 -y} {Invalid non-positional argument '-y', valid are : -x;
+  ? {c1 p1 -x 1 -y} {invalid non-positional argument '-y', valid are : -x;
  should be "::c1 p1 ?-x value?"}
 
   proc ::nsf::argument::unknown {method arg args} {
     puts stderr "??? unknown nonpos-arg $arg in $method obj <$args>\n[info frame -1]\n"
     return ""
   }
 
-  ? {c1 p1 -x 1 -y} {Invalid non-positional argument '-y', valid are : -x;
+  ? {c1 p1 -x 1 -y} {invalid non-positional argument '-y', valid are : -x;
  should be "::c1 p1 ?-x value?"}
 
   if {0} {
@@ -86,7 +86,7 @@
       return ""
     }
     
-    ? {c1 p1 -x 1 -y} {Invalid non-positional argument '-y', valid are : -x;
+    ? {c1 p1 -x 1 -y} {invalid non-positional argument '-y', valid are : -x;
  should be "::c1 p1 ?-x value?"}
   }
 }
Index: tests/method-require.test
===================================================================
diff -u -rc4997e0189bb712287aa53d12bb3e332acfb781d -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- tests/method-require.test	(.../method-require.test)	(revision c4997e0189bb712287aa53d12bb3e332acfb781d)
+++ tests/method-require.test	(.../method-require.test)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -126,5 +126,5 @@
 
   nx::Object create o
   ::nsf::method::require o alloc
-  ? {o alloc x} {Method alloc not dispatched on valid class}
+  ? {o alloc x} {method alloc not dispatched on valid class}
 }
Index: tests/methods.test
===================================================================
diff -u -r7413d266916a491ff674489513351c89987366d7 -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- tests/methods.test	(.../methods.test)	(revision 7413d266916a491ff674489513351c89987366d7)
+++ tests/methods.test	(.../methods.test)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -421,15 +421,15 @@
   }
 
   # dispatch methods without current object 
-  ? ::o::a "Method ::o::a not dispatched on valid object"
+  ? ::o::a "method ::o::a not dispatched on valid object"
   ? ::o::b "::o2"
-  ? ::o::foo "No current object; command called outside the context of a Next Scripting method"
-  ? ::o::x "No current object; x called outside the context of a Next Scripting method"
+  ? ::o::foo "no current object; command called outside the context of a Next Scripting method"
+  ? ::o::x "no current object; x called outside the context of a Next Scripting method"
   # make a regular call, provide tcd->object with a value
   ? {::o x} "::o"
   # check, if missing object is still detected
-  ? ::o::x "No current object; x called outside the context of a Next Scripting method"
-  ? nx::self "No current object; command called outside the context of a Next Scripting method"
+  ? ::o::x "no current object; x called outside the context of a Next Scripting method"
+  ? nx::self "no current object; command called outside the context of a Next Scripting method"
 }
 
 
Index: tests/parameters.test
===================================================================
diff -u -r618e2ee5017eb139591870f9f521b971bb16bbc2 -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- tests/parameters.test	(.../parameters.test)	(revision 618e2ee5017eb139591870f9f521b971bb16bbc2)
+++ tests/parameters.test	(.../parameters.test)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -24,9 +24,9 @@
   ? {::nsf::method::alias C foo ::set} "::nsf::classes::C::foo"
 
   ? {::nsf::method::alias C foo ::set 1} \
-      {Invalid argument '1', maybe too many arguments; should be "::nsf::method::alias object ?-per-object? methodName ?-frame method|object|default? cmdName"}
+      {invalid argument '1', maybe too many arguments; should be "::nsf::method::alias object ?-per-object? methodName ?-frame method|object|default? cmdName"}
 
-  ? {C eval {:property x -class D}} {Invalid argument 'D', maybe too many arguments; should be "::C property ?-class value? spec ?initblock?"} "Test whether the colon prefix is suppressed"
+  ? {C eval {:property x -class D}} {invalid argument 'D', maybe too many arguments; should be "::C property ?-class value? spec ?initblock?"} "Test whether the colon prefix is suppressed"
 }
 
 #######################################################
@@ -640,7 +640,7 @@
   # create a userdefined type
   ::nx::methodParameterSlot method type=mytype {name value} {
     if {$value < 1 || $value > 3} {
-      error "Value '$value' of parameter $name is not between 1 and 3"
+      error "value '$value' of parameter $name is not between 1 and 3"
     }
   }
 
@@ -650,7 +650,7 @@
   d1 foo 1
 
   ? {d1 foo 10} \
-      "Value '10' of parameter a is not between 1 and 3" \
+      "value '10' of parameter a is not between 1 and 3" \
       "value not between 1 and 3"
   
   D public method foo {a:unknowntype} {
@@ -664,7 +664,7 @@
   # create a userdefined type with a simple argument
   ::nx::methodParameterSlot method type=in {name value arg} {
     if {$value ni [split $arg |]} {
-      error "Value '$value' of parameter $name not in permissible values $arg"
+      error "value '$value' of parameter $name not in permissible values $arg"
     }
     return $value
   }
@@ -675,7 +675,7 @@
   
   ? {d1 foo a} "a=a"
   ? {d1 foo 10} \
-      "Value '10' of parameter a not in permissible values a|b|c" \
+      "value '10' of parameter a not in permissible values a|b|c" \
       "invalid value"
   
   D public method foo {a:in,arg=a|b|c b:in,arg=good|bad {-c:in,arg=a|b a}} {
@@ -685,13 +685,13 @@
   ? {d1 foo a good -c b} "a=a,b=good,c=b"
   ? {d1 foo a good} "a=a,b=good,c=a"
   ? {d1 foo b "very good"} \
-      "Value 'very good' of parameter b not in permissible values good|bad" \
+      "value 'very good' of parameter b not in permissible values good|bad" \
       "invalid value (not included)"
   
   ::nx::methodParameterSlot method type=range {name value arg} {
     foreach {min max} [split $arg -] break
     if {$value < $min || $value > $max} {
-      error "Value '$value' of parameter $name not between $min and $max"
+      error "value '$value' of parameter $name not between $min and $max"
     }
     return $value
   }
@@ -703,12 +703,12 @@
   ? {d1 foo 2 -b 4 9} "a=2,b=4,c=9"
   ? {d1 foo 2 10} "a=2,b=3,c=10"
   ? {d1 foo 2 11} \
-      "Value '11' of parameter c not between 5 and 10" \
+      "value '11' of parameter c not between 5 and 10" \
       "invalid value"
   
   # define type twice
   ? {D public method foo {a:int,range,arg=1-3} {return a=$a}} \
-      "Parameter option 'range' unknown for parameter type 'integer'" \
+      "parameter option 'range' unknown for parameter type 'integer'" \
       "invalid value"
   #
   # handling of arg with spaces/arg as list
@@ -1489,7 +1489,7 @@
   }
 
   set ::_ ""
-  ? {C create c2 -y 1 -x} {Value for parameter '-x' expected}
+  ? {C create c2 -y 1 -x} {value for parameter '-x' expected}
   ? {set ::_} ""
   ? {c2 x} {can't read "x": no such variable}
   ? {C create c3 -y 1 -x 0} "::c3"
@@ -1904,14 +1904,14 @@
     ::nx::ObjectParameterSlot method type=range {name value arg} {
       lassign [split $arg -] min max
       if {$value < $min || $value > $max} {
-	error "Value '$value' of parameter $name not between $min and $max"
+	error "value '$value' of parameter $name not between $min and $max"
       }
       return $value
     }
     ::nx::ObjectParameterSlot method type=range {name value arg} {
       lassign [split $arg -] min max
       if {$value < $min || $value > $max} {
-	error "Value '$value' of parameter $name not between $min and $max"
+	error "value '$value' of parameter $name not between $min and $max"
       }
       return $value
     }
@@ -1920,9 +1920,9 @@
     # Test usage of application specific converter in "variable" and
     # "property"; invalid value
     ? [list [self] variable -nocomplain r1:range,arg=1-10 11] \
-	{Value '11' of parameter value not between 1 and 10}
+	{value '11' of parameter value not between 1 and 10}
     ? [list [self] property -nocomplain [list r2:range,arg=1-10 11]] \
-	{Value '11' of parameter value not between 1 and 10}
+	{value '11' of parameter value not between 1 and 10}
 
     # valid value
     ? [list [self] variable  -nocomplain r1:range,arg=1-10 5] ""
@@ -1995,7 +1995,7 @@
 
   ? {C create c2 -a 10} ::c2
   ? {C create c2 -v 10} \
-      {Invalid non-positional argument '-v', valid are : -a, -volatile, -properties, -noinit, -mixin, -class, -filter;
+      {invalid non-positional argument '-v', valid are : -a, -volatile, -properties, -noinit, -mixin, -class, -filter;
  should be "::c2 configure ?-a value? ?-volatile? ?-properties value? ?-noinit? ?-mixin mixinreg ...? ?-class class? ?-filter filterreg ...? ?__initcmd?"}
 
   #
Index: tests/protected.test
===================================================================
diff -u -rc4997e0189bb712287aa53d12bb3e332acfb781d -r59e100d383b22ea1407f5e5c40e303f2c6bb9027
--- tests/protected.test	(.../protected.test)	(revision c4997e0189bb712287aa53d12bb3e332acfb781d)
+++ tests/protected.test	(.../protected.test)	(revision 59e100d383b22ea1407f5e5c40e303f2c6bb9027)
@@ -114,39 +114,39 @@
   ? {::nsf::method::property C foo redefine-protected true} 1
   
   ? {C method SET {a b c} {...}} \
-      {Method 'SET' of ::C cannot be overwritten. Derive e.g. a sub-class!} \
+      {method 'SET' of ::C cannot be overwritten; derive e.g. a sub-class!} \
       "redefine method SET"
   
   ? {C method foo {a b c} {...}} \
-      {Method 'foo' of ::C cannot be overwritten. Derive e.g. a sub-class!} \
+      {method 'foo' of ::C cannot be overwritten; derive e.g. a sub-class!} \
       "redefine method foo"
   
   # check a predefined protection
   ? {::nx::Class method create {a b c} {...}} \
-      {Method 'create' of ::nx::Class cannot be overwritten. Derive e.g. a sub-class!} \
+      {method 'create' of ::nx::Class cannot be overwritten; derive e.g. a sub-class!} \
       "redefine method create"
   
   # try to redefine predefined protected method via alias
   ? {::nsf::method::alias nx::Class create ::set} \
-      {Method 'create' of ::nx::Class cannot be overwritten. Derive e.g. a sub-class!} \
+      {method 'create' of ::nx::Class cannot be overwritten; derive e.g. a sub-class!} \
       "redefine alias create"
   
   # try to redefine via forward
   ? {C forward SET ::set} \
-      {Method 'SET' of ::C cannot be overwritten. Derive e.g. a sub-class!} \
+      {method 'SET' of ::C cannot be overwritten; derive e.g. a sub-class!} \
       "redefine forward SET"
 
   # try to redefine via setter
   ? {C property SET} \
-      {Method 'SET' of ::C cannot be overwritten. Derive e.g. a sub-class!} \
+      {method 'SET' of ::C cannot be overwritten; derive e.g. a sub-class!} \
       "redefine property SET"
   
   # redefine-protect object specific method
   nx::Object create o
   o method foo {} {return 13}
   ::nsf::method::property o foo redefine-protected true
   ? {o method foo {} {return 14}} \
-      {Method 'foo' of ::o cannot be overwritten. Derive e.g. a sub-class!}
+      {method 'foo' of ::o cannot be overwritten; derive e.g. a sub-class!}
 }