If you're using local, I'm pretty sure the var needs to be previously declared as global (ie, the error is that the script can't localise something that doesn't exist). I don't use local much though...

Put either of these at the beginning of the script:

our @a = ();

# or

use vars qw(@a);
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That should do the trick - unless I'm missing something else from your snipped code...

.02

cLive ;-)