As has been posted, there is no way truly to "know". Anyone could use any of your symbols at any time for any reason that they so choose. The most common usages that come to mind are within system commands, parmlib processing, catalog entries, and the proc for started tasks/jobs (where the system, with a few exceptions, will do the processing automatically). But any application (or system code) may use routine ASASYMBM to perform system symbol substitution.
The places that have been mentioned are all good places to look if you're searching for likely uses. I'm guessing that the creator of the symbol did not comment on why they wanted the symbol and you'd like to get rid of unused symbols. The system really cannot help you. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
