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if(/;;HPLCColumn;;([0-9]+);/){
                            if ($number == 2){
                             $HPLC_Collum= $1;
...
                        }else {
                           die ; 
                        }

if(<CONFIG>=~/;;HPLCColumn;;([0-9]+);/){                          
    $HPLC_Collum= $1;
    }