Hi nuffin, Thanks much for an almost instant reply. I used NBDM_File and tie and tried the following snippet of code. It still cores when it reaches foreach loop (to sort and print the hash to a file)If i take the foreach loop out, it works fine. I need your help again...I want to sort the hash in ascending order of numeric key and print to a file. Thank you!!! 
use NBDM_File;

tie(%h,NDBM_File,'test_tie.tmp',O_RDWR/O_CREAT, 0640);

while (<INPUT>)
{
   $id = substr($_, 9, 11);
   if (! exists($h{$id}) )
   {
     $h{$id} = $_;
   }
   else
   {
     ....
     ....
   }
}

foreach (sort keys %h)
{
  print OUTPUT $h{$_};
}

untie %h;

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In reply to Re: Re: Hashes -- Core dump by Anonymous Monk
in thread Hashes -- Core dump by Anonymous Monk

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