I've heard of, but never used Leor Zolman's STL Error Message Decryptor

<http://www.bdsoft.com/tools/stlfilt.html>

uses perl.

Joe Swatosh                | mailto:Joe.R.Swatosh@usace.army.mil
nLink contract employee    | mailto:jswatosh@n-link.net
US Army Corps of Engineers | Northwestern Division, Portland District
CENWP-HDC-P                | Hydroelectric Design Center
220 NW 8th Ave             | v:(503) 808-4032
Portland, OR 97209         | f:(503) 808-4029