Alternative procedure

Look at the system dump and issue the IPCS command, SUMMARY FORMAT, to format the linkage stack for the failing task or SRB. In most cases, the top entry on this linkage stack represents the current RACF® service; this can be validated by taking the formatted PSW for the stack entry and scrolling backward in memory in search of a module eyecatcher that has a RACF prefix, ICH or IRR.
If this stack entry represents a RACF service, then general purpose register 13 should point to a standard save area, and the caller of RACF can be located by tracing backward through a chain of such areas. If these steps do not appear to have produced the caller of RACF, then you cannot determine the caller of RACF without additional support.