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Patrik,

This result is consistent with the original problem of calling the routine but not providing the 4th parameter.

When you leave the parameter off of the parameter list, the system uses whatever "by chance" happens to be in memory at that spot in the parameter list.  So if it happens to be a valid null pointer, the program would work as expected.  If it does not, it'd crash with MCH3601.

You say that your version does not have this parameter, which seems unlikely to me as the 'pw_rand.c' source on GitHub was last changed on Aug 6, 2017.  That's almost 3 years old.

-SK

On 5/22/2020 3:21 PM, Patrik Schindler wrote:
Thanks again for your valuable suggestions! I'll get back to you tomorrow or next week. I'm confused myself because after recompiling/linking the unchanged RPG module with compiler optimization turned on, the problem is back again. Turning off optimization again: Problem persists. Checking: Yes, I'm calling the right *PGM object. Sign off/back on: Problem persists (could have been some strange activation group thing, eventhough I link with ACTGROUP(*NEW).


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