Hi Prasanna.k

Use Single Quote in $line string

$line = 'this is TelecommuterTrac\WebIntHitList3';
$line=~s#\QTelecommuterTrac\WebIntHitList3\E#country#;
[download]

Or

$line = 'this is TelecommuterTrac\WebIntHitList3';
$findstr='TelecommuterTrac\WebIntHitList3';
$findstr=quotemeta($findstr);
$line=~s#$findstr#country#;
[download]

Output will get: