If the fixed asset system records a disposal transaction, the asset would seem to be flagged as disposed.  Why, then, does the system continue to attempt depreciation every month thereafter?  It would seem that a disposed asset would simply be flagged as such and going forward all disposed assets are ignored for depreciation calculations.  (The system knows they are disposed since they show up on the control report every month for calculations)  Or at least add this as a direct filter option to exclude disposed assets.