Hello Kalim - Thanks. I have already configured Search string the way you suggested me last time and imported the statement during testing. It is working fine.
Can you pls tell me in which scenario "mapping prefix field" should be maintained. Now, I will try to understand this from F1 help.
For Search Strings already defined in our System long ago that Posting rule is not specified in Target field in mapping field, but maintained Mapping prefix.
Thanks,
GT