Forced termination of IMS

You normally use the /CHECKPOINT command to shut down IMS. However, in certain error situations such as a control region loop, you might need to force termination of IMS. In this case, use the z/OS® MODIFY command, and be sure to request a dump of the IMS control region.

You can also use the z/OS CANCEL command, specifying the DUMP keyword, to terminate IMS. If you need to enter this command more than once, give each CANCEL time to complete before entering it again.

Attention: Using the z/OS CANCEL command more than once might stop IMS from completing termination tasks in the proper order and from releasing z/OS system resources. If IMS does not complete termination, you might need to IPL your system before restarting IMS.