$2 is undefined when you assign it to $mac2 because you ran another regex in between, and that regex cleared $2. Assign $2 to $mac2 before the substitution, and it will work OK.

In reply to Re^3: Can anyone tell me what is going on with my code?(Regex match variables) by Laurent_R
in thread Can anyone tell me what is going on with my code?(Regex match variables) by samh785

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