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Brian, > Granted, $dimids[0] is correct. But why, then, did this not cause the script > to crash EVERY time? It worked on some files, not others. I think that's "perl" trying to be helpful. If you access beyond the end of an array, perl automatically extends the array for you. I have no idea what would be in the extended portion of the array. Regards, Steve Emmerson Ticket Details =================== Ticket ID: IHB-309481 Department: Support netCDF Perl Priority: Normal Status: Closed