You could also try to specify the characters you want, and replace everything else (this makes sure you don't miss any special characters you haven't thought of (yet)). untested: 
  $tvid =~ s/[^a-zA-Z0-9_-]/_/g;

[download]

Update: Fletchs solution using tr///cs would be more efficient.

In reply to Re: All special character substitution and/or drop from column names. by chb
in thread All special character substitution and/or drop from column names. by paulu

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