Index: openacs-4/packages/acs-templating/tcl/list-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-templating/tcl/list-procs.tcl,v
diff -u -N -r1.55 -r1.56
--- openacs-4/packages/acs-templating/tcl/list-procs.tcl	23 Oct 2008 09:26:32 -0000	1.55
+++ openacs-4/packages/acs-templating/tcl/list-procs.tcl	25 Feb 2009 13:47:41 -0000	1.56
@@ -2919,7 +2919,7 @@
         default {
             # We require all properties to be initialized to the empty string in the array, otherwise they're illegal.
             if { ![info exists orderby_properties($property)] } {
-                error "Unknown orderby property '$property'. Allowed properties are [join [array names orderby_properties] ", "]."
+                error "Unknown orderby property '$property' for column '$orderby_name' in list '$list_name'. Allowed properties are [join [array names orderby_properties] ", "]."
             }
 
             # All other vars, do an uplevel subst on the value now