I can't see the actual mistake, but here are some things you should always do and maybe that even fixes your problem:

• Always use "use strict;"!! You might even want to use the "-w" tag.
• Don't use global variables to pass data to subroutines. use something like that instead: &count ($cathegory);
• Try to enter an "chomp ($zahl);" between reading it and the incement-operator
• Maybe it helps for debuging to insert that line after "$zahl++;":
  if (!$zahl) { &fehler ('Counter is zero'); }

If that doesn't help at all review your flush/flock code. I never lock counter files and it always works fine, so I don't thinks it's neccessary..
Regards, octopus

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