TypeError: unsupported operand type(s) for -: 'Decimal' and 'Decimal'. Why?

Gilbert Fine gilbert.fine at gmail.com
Mon Jul 30 12:36:33 CEST 2007

This is a very strange exception raised from somewhere in our program.
I have no idea how this happen. And don't know how to reproduce. It
just occurs from time to time.

Can anyone give me some suggestion to fix this?



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