Sounds like you're pulling a file name from your delimited file, and using it to find (somewhere) any files that match, and when a match is found, copy that file to another directory/location.
Assuming that's correct, I agree with Joost, that File::Find and File::Copy are the way to go, 'cause you need to traverse recursively. Something like (untested):
find(\&findit,'/path/to/highest/level/dir/you/need/to/start/from');
sub findit {
/^your_regex$/ && ## your match regex would replace "your_regex"
copy("$File::Find::name","/path/to/copy/location/$_")
}
Probably flaws in my suggestion, but hopefully this will get you headed in the right direction.
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