If the system detects an unrecoverable error and abnormally ends the APPC address space, and APPC automatically restarts, message ATB005I indicates that APPC is restarting. In addition, the following occurs:

• The cross-system coupling facility (XCF) notifies the members of APPC's XCF group that APPC is unavailable.
• The system shuts down all active logical units (LU).
• The system does not save or restore active APPC conversations, either local and remote. The conversations will be lost and the system will notify the invoking applications.
• The system will not read the APPCPMxx parmlib member during restart. The parmlib members that were in effect prior to the restart will still be in effect following the restart.
• The system deletes the cache of TP profiles and side information. Following restart, the system refills the cache during normal processing.
• If APPC component trace is active before APPC abnormally ends, the system dumps the trace records when APPC abnormally ends and the APPC trace will not be active following restart.
• The system does not save or restore information regarding schedulers when APPC abnormally ends and restarts.
• XCF notifies the members of the APPC's XCF group that APPC is available once it restarts.