Hi stevieb, That works and thank you for your help. Yes, I agree that just two lines are not enough for thorough testing, and so I tried to run it on the entire file that gets generated dynamically but got the following error: 
Code point \u0016 is not a valid character in XML at ./Call_to_snmpwal
+k.pl line 32.

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This is line $xml->dataElement($subscript_name => $subscript_value);

I am trying to see what else can I find. It seems like data related issue though as from error message it looks like: Some data was generated which is not considered as valid xml character.

@toolid: Thank you for your help, but I was using $string1 in code at:

$xml->startTag($string1);

In reply to Re^2: What regex changes are needed while creating xml by Perl300
in thread [Solved]:What regex changes are needed while creating xml by Perl300

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