Monitor the console to ensure that the listener successfully initializes. If it does not, look up the return (errno) and reason code (errnojr) in ../com.ibm.zos.v2r1.bpxa800/bpx1mc00.htm. When looking up the reason code, use only the low-order halfword of the displayed value. There is a name and a value for each return code. For more information about the identified service service-name, see z/OS UNIX System Services Programming: Assembler Callable Services Reference for more information about common errors, by name, that include possible causes.

Verify that TCP/IP and z/OS® UNIX System Services are still active

If the listener fails to reestablish itself, another error message is displayed. See that message for further action. If the problem persists, contact IBM® service.