That is not an example, it is the actual content which i have to change

Really? It's just "YYY" that you have to replace with "XXX"? Just those three time the letter "Y"? And your tags are always X-REF followed by exactly a space, then REFID, then a =, then a ", etc? No spaces around the =, no single quotes? Good, then my regexes don't need any work! 

print OUT $data;

[download]
Why are you printing $data? What's in that?

Furthermore, if you read in the file line by line, you will only do the substitution if both the X-REF and the corresponding FTN are on the same line.

Abigail

In reply to Re: replacing text in specific tags by Abigail-II
in thread replacing text in specific tags by texuser74

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