Your program is using variables that have not been declared and initialized. The first step should be to add these pragmas to your programs: 
use strict;
use warnings;

[download]
This will show a number of errors and/or warnings that you should then correct.

BTW, is here anything wrong with properly indenting your programs? Consistent indentation is not optional, it is essential to the human reader.

Fix these things and come back and ask if it's still not working properly. My fellow monks and myself will be delighted to help you further once you show us a corrected program.

In reply to Re: rename files by Laurent_R
in thread rename files by flieckster

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