Hello VickyRai1,
Please use the below code in Business Rule
(function executeRule(current, previous /*null when async*/) {
// gs.addInfoMessage("Result:"+current.hasAttachments());
if(current.hasAttachments() != true){
gs.addInfoMessage("Please add an attachment");
current.setAbortAction(true);
}}
)(current, previous);
And set When to run as before , update.
use condition as requested item.item is "catalog item name".
and state changes to closed complete.
