Thank you hbm. Yes, my record has changed. I started with a tab delimited file with "EOF." record separator but it didn't work out since the script processed only up to 14,000 lines and then exit without any error. Plus, I was missing one of the components in my original text. So, I started working on another output format from the same text. In the new format, records are separated with two blank lines so I thought to use \n\n\n as the separator
For some reason when I tried to post my question spaces were being eliminated in my post so by typing (\s\s) I was trying to imply that in my real record there are two spaces before my mapping starts.Sorry, my bad!
Thank you again for all your help and explanation. Is there any book you recommend for a Perl beginner like me to start with? I started with Perl Programming for Medicine and Biology" but I think some basic (and fundamental) concepts are not covered in that book.

In reply to Re^4: tab delimited extraction, formatting the output by zzgulu
in thread tab delimited extraction, formatting the output by zzgulu

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