Check that your ID file does not have hidden spaces, tabs etc. Ensure 'clean' data by adding a regex

while (<FILEID>){
  chomp;
  s/[\s]//g;
  $ID{$_}=1 if $_;
}

[download]
poj

In reply to Re^3: comparing an ID fom one file to the records in the second file by poj
in thread comparing an ID fom one file to the records in the second file by ag88

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