Thank you choroba and Laurent_R. I have made necessary changes to use unlink instead of rm.
I also got useful idea from information at unlink. Thank you for that suggestion.

In reply to Re: [SOLVED]: Using glob in file test gives "Use of uninitialized value in -e" warning. by Perl300
in thread [SOLVED]: Using glob in file test gives "Use of uninitialized value in -e" warning. by Perl300

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