diff --git a/doc/source_var/main.sh b/doc/source_var/main.sh
index e96cc7f..07b387b 100755
--- a/doc/source_var/main.sh
+++ b/doc/source_var/main.sh
@@ -8,4 +8,4 @@ export "mod=$1"
 
 
 ja
-
+[ "$?" != "0" ] && echo use $0 with doja.sh next time ;)