Restrictions

For all types of ATBTRACE requests, the caller cannot have any enabled unlocked (EUT) functional recovery routines (FRRs) established. For more information about EUT FRRs, see the section on providing recovery in z/OS MVS Programming: Authorized Assembler Services Guide.
Depending on your installation's security policy, START and STOP requests might require READ access to the ATBTRACE security profile. If APPC/MVS returns an ATB6xxxxI message indicating security violations, see your system programmer or system administrator for assistance.