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 -r1.26 -r1.27
--- openacs-4/packages/xotcl-core/tcl/chat-procs.tcl	16 Oct 2017 13:19:24 -0000	1.26
+++ openacs-4/packages/xotcl-core/tcl/chat-procs.tcl	17 Oct 2017 13:46:30 -0000	1.27
@@ -174,9 +174,17 @@
     }
     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 {} {