>                      S1 => "$username_mod",

THis is trying to access a variable named $username_mod

I assume you want to append _mod onto variable $username?

Try "${username}_mod" or $username.'_mod'

-- 
 - - Martin "Kingpin" Thurn                    [EMAIL PROTECTED]
     Research Software Engineer           (703) 793-3700 x2651
     The Information Refinery              http://tir.tasc.com
     TASC, Inc.                            http://www.tasc.com

Looking?  Found someone, you have, I would say, hmmm? -- Yoda, The Empire Strikes Back

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