You are trying to populate a multivalue field from a multi-multi-value field. Just be cautious and check the cardinality.
After making sure numbers match, try poppulating the value from your function (SQL code from field rule) into a plain text field. Does it work? Do you get the value(s) you should? No, check the function. Yes, Consider a different approach. The problem may be the fact that your target field (Send To) is multi select.
Hi Mohanty, Can you please send the token(for request_id) that you pass from the rule to the function. Also, what value does the token that you use resolve to at run time? Can you please capture that as well. Thanks!
Now I have changedthe function. It passes the token of the 'Send To' field. Populated the results into a simple text field,it works. But doesn't work for the 'Send To' field which is a multi select ACL.