In your line

my $match = 'System\s+has\s+tool\s+([0-9a-zA-Z_-]+)\s+version\s+(.*)';

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you have a character class [0-9a-zA-Z_-] but if you are intending that a hyphen is part of the class you must place it first in the class like this [-0-9a-zA-Z_]. Anywhere else in the class the hyphen denotes a range so your one is a class of 0 to 9, a to z, A to Z and underscore to nothing.

Cheers,

JohnGG

In reply to Re: delayed variable interpolation in a regular expression by johngg
in thread delayed variable interpolation in a regular expression by wannabeperlie

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