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Multiple Instances of windows app not working with PowerBuilder 12.6

Multiple Instances of windows app not working with PowerBuilder 12.6

Multiple Instances of windows app not working with PowerBuilder 12.6

We recently migrated our windows application from PB 12.5 to PB 12.6 [classic].

We just discovered that if we try to run multiple instances of our executable we immediately get app_name.exe has stopped working. The only options are Close the program or Debug the program.

CLUE: If the first instance is simply signed in, a 2nd instance can also get signed it. However, if the first instance has a screen opened from the menu [typical], then when the 2nd instance is attempted the crash/error occurs. This error condition ends up causing both instances to display 'not responding' and need to be closed.

ADDITIONAL: I tried our old PB12.5 generated executable and there are NO issues running multiple instances.

I can't get anywhere with the Debug the application option.

Has anyone seen this behavior?

I appreciate any comments, suggestions, etc.

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