Joined: 13 Jun 2007 Posts: 826 Location: Wilmington, DE
You cannot have checkpoints in an IMS DC program - only in BMP. You may want to check with your systems programmers about your automatic backout. If your program updated 2 of 3 databases in 1 transaction and did not automatically backout the updates then you have a big problem.
Joined: 07 Nov 2005 Posts: 1105 Location: The Netherlands at Hole 19
That probably was muliple-mode. Sandy referred to the common way of single-mode where checkpoints are implicit at the GU-call at the message-queue which is done after hitting the ENTER key (or after the program switch).
For TS; follow the sticky, there's a lot about isolation.