Index: openacs-4/packages/acs-tcl/tcl/cluster-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/cluster-procs.tcl,v
diff -u -r1.1.2.7 -r1.1.2.8
--- openacs-4/packages/acs-tcl/tcl/cluster-procs.tcl	27 Feb 2023 17:57:44 -0000	1.1.2.7
+++ openacs-4/packages/acs-tcl/tcl/cluster-procs.tcl	2 Mar 2023 12:33:39 -0000	1.1.2.8
@@ -448,7 +448,7 @@
             # server specs. The canonical server might listen on
             # multiple protocols, IP addresses and ports.
             #
-            if { ${:canonicalServer} eq "" } {
+            if { ![info exists :canonicalServer] || ${:canonicalServer} eq "" } {
                 ns_log Error "Your configuration is not correct for server clustering." \
                     "Please ensure that you have the CanonicalServer parameter set correctly."
                 return 1
@@ -463,7 +463,7 @@
             #
             # Check, if the current server is the canonical_server.
             #
-            if { ${:canonicalServer} eq "" } {
+            if { ![info exists :canonicalServer] || ${:canonicalServer} eq "" } {
                 ns_log Error "Your configuration is not correct for server clustering." \
                     "Please ensure that you have the CanonicalServer parameter set correctly."
                 return 1