Qt Code: 
  1. QProcess *proc = new QProcess(NULL); // no parents cause i dont want to bind those two applications, i just want to start it without parent....
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It looks like you are using a local pointer 'proc'.
At the end of the function it will be destroyed - no wonder the application crashes.

You have to make your QProcess pointer a member, and it has to live as long as the process you are running with it lives.