Do you check Perl was able to open the files? Use or die 
open my $file_one, '<', 'ABC' or die $!;

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or, use autodie.

لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: Nested While loop not working by choroba
in thread Nested While loop not working by Manisha

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