When an outbound TP's allocate request includes inadequate security information to access its partner LU or TP on MVS, APPC/MVS passes a return code of security_not_valid on a call following the allocate call. For more information about that return code, see z/OS MVS Programming: Writing Transaction Programs for APPC/MVS. RACF messages on the inbound system indicate any errors in the specification of RACF® profile information. APPC/MVS messages indicate errors in specifying security information in TP profiles and side information. For explanations of the diagnostic messages, see z/OS Security Server RACF Messages and Codes and z/OS MVS System Messages, Vol 3 (ASB-BPX).

As an aid to debugging access problems and detecting security exposures, you can use RACF auditing to keep track of access to RACF profiles. For example, you can audit all attempted accesses, all successful accesses, and all failed accesses to a particular profile or class of RACF profiles.

You can also use APPC component trace options to collect and diagnose the security information that crosses the network in an allocate request. See z/OS MVS Diagnosis: Tools and Service Aids for information about requesting and formatting FMH-5 data with APPC component trace.