Diagnosis
You want to delete calculation method &V1&. However, this is notpossible, since method &V1& is still being used, at least indepreciation key &V2& of chart of depreciation &V3&.

System Response
Calculation method &V1& is not deleted.

Procedure
You cannot delete calculation method &V1& until all depreciation keysthat use it have been changed accordingly or deleted. Use the "whereused" function to see the depreciation keys in which method &V1& isstill being used.