Index: openacs-4/packages/xotcl-core/tcl/chat-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xotcl-core/tcl/Attic/chat-procs.tcl,v
diff -u -N -r1.24 -r1.25
--- openacs-4/packages/xotcl-core/tcl/chat-procs.tcl	7 Aug 2017 23:48:30 -0000	1.24
+++ openacs-4/packages/xotcl-core/tcl/chat-procs.tcl	11 Sep 2017 17:03:09 -0000	1.25
@@ -173,9 +173,18 @@
       my add_msg -get_new false $msg
     }
     my instvar array
-    ::xo::clusterwide nsv_unset -nocomplain $array-login         $user_id
-    ::xo::clusterwide nsv_unset -nocomplain $array-color         $user_id
-    ::xo::clusterwide nsv_unset -nocomplain $array-last-activity $user_id
+    
+    # This values could already not be here. Just ignore when we don't
+    # find them
+    catch {
+      ::xo::clusterwide nsv_unset -nocomplain $array-login $user_id
+    }
+    catch {
+      ::xo::clusterwide nsv_unset -nocomplain $array-color $user_id
+    }
+    catch {
+      ::xo::clusterwide nsv_unset -nocomplain $array-last-activity $user_id
+    }
   }
 
   Chat instproc init_user_color {} {