I admit I have not tried running your code, but I will make the following suggestions, which I strongly suspect will lead you to your answer:

• when performing a file or directory operation, make sure you test the result, and
• if it fails (especially while still under development) consider looking at the error variable $!.

I say this because I noticed that in your main routine you perform an opendir() and die() on error with a custom error message, ans in your godeep() routine you perform an opendir() and assume success.

Hope that helps.

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