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Thank you, I have understood the first part. Instead I didn't understand the cout problem, because with fflush() I free the buffer. Is not concerned?
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As I said, I didn't know what the purpose of fflush() was. If it indeed waits for the cout buffer to free, it could avoid all the above problems, since this wait delay would keep the tasks synchronized.
However, I don't know how cout and its send buffer are managed at the lower levels, then I'd suggest you run your code without cout/fflush calss (add TKSLEEP(10) instead), in order to test the tasks sequencing itself. This way you can discriminate what really originates the crash problem.
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