Field help (DPRDUR6) 

Help common to the single and mass processes for the account posting change.
When the corresponding Update indicator is set to Yes, this field displays the depreciation duration defined by the field associations. This value can only be entered or modified if the Process indicator is activated for the plan and if the Update field is set to Yes. The rules for the entry and the value of the depreciation duration are a function of the depreciation method entered: