finding the string in dsn member ... fails. I am trying usung Isuprc.
You did not provide details of what you are searching for, where you are searching, how you are searching for it and details of the failure. It is not clear what you are trying... did you mean ISRSUPC? (ISRSUPC is the module name for the SRCHFOR utility , so maybe you are talking about the same thing as others).
I have a feeling that NicC's suggestion is probably the right solution.
BTW, re: Isuprc ... this is a technical forum. Mis-typing a key piece of information just wastes everyone's time. Please strive to be accurate.