Index: openacs-4/packages/chat/tcl/chat-ajax-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/chat/tcl/chat-ajax-procs.tcl,v
diff -u -N -r1.12.2.3 -r1.12.2.4
--- openacs-4/packages/chat/tcl/chat-ajax-procs.tcl	22 Nov 2016 18:34:35 -0000	1.12.2.3
+++ openacs-4/packages/chat/tcl/chat-ajax-procs.tcl	23 Nov 2016 13:50:51 -0000	1.12.2.4
@@ -14,8 +14,8 @@
 	:instvar chat_id
 	if {[chat_room_exists_p $chat_id]} {
 	    chat_room_get -room_id $chat_id -array c
-	    :set login_messages_p  $c(login_messages_p)
-	    :set logout_messages_p $c(logout_messages_p)
+	    set :login_messages_p  $c(login_messages_p)
+	    set :logout_messages_p $c(logout_messages_p) 
 	}
 	next
     }
@@ -104,7 +104,7 @@
     # the user of being looking at an invalid chat
     Chat instproc check_valid_room {} {
 	if {![chat_room_exists_p [:chat_id]]} {
-	    ns_return 500 text/plain [_ chat.Room_not_found]
+	    ns_return 500 text/plain "chat-errmsg: [_ chat.Room_not_found]"
 	    ad_script_abort
 	}
     }
Index: openacs-4/packages/chat/www/room.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/chat/www/room.tcl,v
diff -u -N -r1.8.4.3 -r1.8.4.4
--- openacs-4/packages/chat/www/room.tcl	22 Nov 2016 18:34:35 -0000	1.8.4.3
+++ openacs-4/packages/chat/www/room.tcl	23 Nov 2016 13:50:51 -0000	1.8.4.4
@@ -73,7 +73,7 @@
     login_messages_p
     logout_messages_p
 } {
-    set $property [expr {[set $property] eq t?"[_ acs-kernel.common_yes]":"[_ acs-kernel.common_no]"}]
+    set $property [expr {[set $property] eq "t" ? [_ acs-kernel.common_yes] : [_ acs-kernel.common_no] }]
 }
 
 # get db-message count