DoModal main application returning -1 code randomly

Question

I have a vc++ program that calls another large exe written in MFC vc++ over and over with create process threads. sometimes the exe fails to start because the DoModal in the exe fails, but not always. out of 6 calls, 2 may not start.

is there some sort of resource limit? or something else that can identify the problem rather than a -1 return code? It seems to be mainly when I run as a service under localsystem account, not sure why - might be a red herring.

In the main application startup main window:-

 CTestDlg dlg;
 int ret = dlg.DoModal();

return code is sometimes -1.

Don't tag something as `random` just because it involves a bug which you can't reliably reproduce. `random` should be reserved for questions involving the use of random number generators. I am thus deleting that tag. — John Coleman, Jul 05 '17 at 21:24
yes, it was always 0. the solution was the heap limit when running as a service is different to normal. — user3725395, Jul 07 '17 at 06:49

score 0 · Answer 1 · answered Jul 06 '17 at 06:52

0

the solution was in article: How to increase the maximum number of child processes that can be spawned by a windows service -- desktop heap limits

worked for me, but had to reboot after making changes for it to take effect.

answered Jul 06 '17 at 06:52

user3725395

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DoModal main application returning -1 code randomly

1 Answers1