Apologies for not scrutinizing your program better earlier. Still, after looking at it, I am a bit puzzled as I thought your code "reads" a file, yet I don't see the filehandle for the input. For reading a file line by line, the usual prescription is: 
while (<INFILE>) {
      ... code goes here
}

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In reply to Re^3: Large file data extraction by eosbuddy
in thread Large file data extraction by micwood

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