The generic answer to your question is that the alphabetically relevant Authorized Assembler Services Manual (almost) always specifies whether and under what circumstances an SRB routine can use the services of a particular macro, but there are often many detailed restrictions.
There are, for example, some GETMAIN facilities than can be used by an SRB routine, but there are others than cannot. You are again asking a very general question without providing much context. Please make what you want to do clearer. Taking the time to do so now will get you better advice more quickly. John Gilmore, Ashland, MA 01721 - USA ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN