Stopping the APPC and ASCH Address Spaces

Because the APPC and ASCH address spaces are started by cataloged procedures specified on a START command, you can immediately stop them with the CANCEL command, as follows:

   CANCEL APPC

   CANCEL ASCH

If your installation is using different jobnames for the APPC and ASCH address spaces, specify the actual jobname on the CANCEL command.

Note:

Cancelling the ASCH address space immediately ends all running or queued TPs scheduled through the APPC/MVS transaction scheduler. Outbound Allocate requests from address spaces not associated with ASCH can be processed only if a NOSCHED system base LU exists.
Cancelling the APPC address space immediately ends all APPC/MVS TPs, schedulers, servers, and LUs, which can have drastic results.
Each time you cancel APPC and ASCH, the system marks the address spaces in which they were running as non-reusable until the next IPL. Therefore, do not cancel and then restart them unnecessarily.