What exactly is your criterion for determining that the program "works" or not? Are you running this on a Unix-like OS?

What you report is not the expected behavior which suggests that it depends on the specifics of your code (including the specific system call). I'd need to see more real code than what you show in your reply to castaway. Could you come up with a small script that reproduces the behavior you describe? I find that in the process of producing such a scriptlet the source of the problem becomes apparent.

the lowliest monk

In reply to Re: system() behaviour within object(class) instance by tlm
in thread system() behaviour within object(class) instance by Robot

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