AVZ1456S ISPF service service error, return code = rcode. Unable to start ISPF dialog.
Explanation
AVZ invoked an ISPF service routine to start the ISPF dialog and received a terminating return code.
User response
Review the message text, and check why the request did not complete successfully. Review your ISPF/AVZ environment, specifically the DEFINE ISPFCONCAT statements in the xxxxIN00 EXEC, and take corrective action. If the error persists, contact Software Support.