Index: openacs-4/packages/xotcl-core/tcl/01-debug-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xotcl-core/tcl/01-debug-procs.tcl,v
diff -u -N -r1.78.2.5 -r1.78.2.6
--- openacs-4/packages/xotcl-core/tcl/01-debug-procs.tcl	30 Dec 2015 18:09:14 -0000	1.78.2.5
+++ openacs-4/packages/xotcl-core/tcl/01-debug-procs.tcl	30 Dec 2015 18:15:54 -0000	1.78.2.6
@@ -103,6 +103,13 @@
       mixins mixins
     }
   }
+
+  #
+  # Make sure, the ::nsf::debug namespace exists (might not be
+  # available in older versions of nsf)
+  #
+  namespace eval ::nsf::debug {}
+  
   proc ::nsf::debug::call {level objectInfo methodInfo arglist} {
       ns_log Warning "DEBUG call($level) - $objectInfo $methodInfo $arglist"
   }