If you read the docs on the exec command, it says: 

The "exec" function executes a system command and never
returns-- use "system" instead of "exec" if you want it to
return.
Basicly, exec replaces your process with the one you are execing, so you never make it back to your loop.

In reply to Re: Problems executing a copy command on win32 by Paladin
in thread Problems executing a copy command on win32 by DaWolf

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