diff --git a/vars/pkill_proc.groovy b/vars/pkill_proc.groovy
index 0a1fe5d..56a1d9b 100644
--- a/vars/pkill_proc.groovy
+++ b/vars/pkill_proc.groovy
@@ -85,6 +85,10 @@
 
     println("** ${iam}: ENTER")
 
+    // var = Gstring throws exception due to cast problem.
+    // var = [ 'foo', 'bar' 'tans' ].join(' ').toString() fails
+    throw new Exception("Not yet implemented")
+
     try {
         // Limit process matching by default
         if (! mymap.containsKey('command_only')) {