Field help (ENDDPRDATD) 

This field is only available if the Update check box is selected to force the end depreciation date for the asset, or in the case of a mass process, for all assets.
It is only authorized to force the depreciation end date if the RA - Amortization expense / net Value or RE - Residual in day pro rata method is used. The date entered must be later than the start date for the fiscal year of the concerned plan context.