Re: Is there a limit of files I can decompress and then open in a script, if I close each one before openning other?

I doubt either perl or your OS has a problem opening & closing 300/400 files. So I'm just offering general advice.

Your program uses $pathC and $cpath. Is this a typo? Adding use strict; and use warnings; would catch that and many other errors (if you're not using thm already, of course).
Perl will tell you why the open failed in the special variable $!.
Is there a good reason why you're opening & closing STDIN? I doubt it's necessary.

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