It looks like you're getting tripped up by operator precendence, and are misdiagnosing (by failing to correctly diagnose) a tie failure. 
tie %h,"DB_File",$users_dbm_file,O_RDWR|O_CREAT,0640,$DB_HASH ||
  die( "Cannot tie $users_dbm_file  $! \n" );

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isn't doing what you expect. Unless $DB_HASH is 0, die will never get invoked. And if $DB_HASH is 0, die will be invoked, but not in the way you expect.

Ponder for a moment the different subtle between || and or. You might wish to read the SYNOPSIS in perlop.

In reply to Re: Add hash to DB_HASH file using DB_File by dws
in thread Add hash to DB_HASH file using DB_File by kha0z

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