Index: openacs-4/packages/chat/lib/current-messages.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/chat/lib/current-messages.tcl,v
diff -u -N -r1.5 -r1.6
--- openacs-4/packages/chat/lib/current-messages.tcl	3 Dec 2018 16:39:19 -0000	1.5
+++ openacs-4/packages/chat/lib/current-messages.tcl	3 Dec 2018 16:42:03 -0000	1.6
@@ -12,7 +12,8 @@
 }
 
 db_multirow -extend { person_name } messages select_msg_itens $sql {
-    if { [catch { set person_name [chat_user_name $creation_user] }] } {
+    set person_name [chat_user_name $creation_user]
+    if {$person_name eq ""} {
         set person_name "Unknown"
     }
 }