Hello,

There are 3 problems I can spot right away:

• You do the if(open(my $CFILE, ...) within the if block. This means that $CFILE is out of scope outside that block and you can't close it. Place the open on its own line like you did for opening dirhandles.
• Hashes need curlies, not parens. Read my code once again: $data_ids{'chipId'}, not $data_ids('chipid'), which translates to a subroutine call.
• Why are you doing the $readline = <$CFILE> once again? You'd be skipping between lines. Like this: read line 1, skip line2, read line 3 and so on. You're already doing it in a while loop, you can delete the second $readline = ..

I'd reiterate once again - work through an introductory perl tutorial like perlintro. You can avoid these kind of mistakes.

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