Index: openacs-4/packages/acs-tcl/tcl/callback-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/callback-procs.tcl,v
diff -u -r1.3 -r1.4
--- openacs-4/packages/acs-tcl/tcl/callback-procs.tcl	7 Aug 2017 23:47:59 -0000	1.3
+++ openacs-4/packages/acs-tcl/tcl/callback-procs.tcl	3 Sep 2024 15:37:34 -0000	1.4
@@ -12,7 +12,7 @@
 } {
     Returns whether the specified implementation exists.
 } {
-    return [expr {[info commands ::callback::${callback}::impl::${impl}] ne ""}]
+    return [expr {[namespace which ::callback::${callback}::impl::${impl}] ne ""}]
 }
 
 ad_proc -public callback::get_object_type_impl {