Causing a break-in event

A break-in event is an event that causes IDF to break in to the target program's execution and regain control, even though no breakpoint was reached. For example, you might need to cause a break-in event if your program has gone into an infinite loop that does not contain a breakpoint.

When IDF initially invokes your program, it has established a STXIT OC exit. If your program has not established its own STXIT OC exit (which overrides the IDF STXIT OC), IDF should receive control when the console command 'MSG partition ID' is entered. This may cause corruption of any open data sets

When a break-in event is recognized, IDF displays the IDF user interface screen as usual and issues a message acknowledging the event. You can then continue your debugging session.