Concurrent Manager encountered an error while attempting to start your immediate concurrent program XXX. Routine &ROUTINE received a return code of failure.

Concurrent program errored with below


Concurrent Manager encountered an error while attempting to start your immediate concurrent program XXX. Routine &ROUTINE received a return code of failure.
Contact your support representative.




Cause could be, when you set retcode = 2 but errbuf is not set


so the concurrent program defaults the error as


Concurrent Manager encountered an error while attempting to start your immediate concurrent program XXX. Routine &ROUTINE received a return code of failure.
Contact your support representative.




Check your program when you set the retcode to 2 (error) and left the errbuf without any text.