Diagnosis
You defined depreciation area &V1& to provide identical values todepreciation area &V2&. However, area &V1& is itself defined to adoptidentical values from another depreciation area. This is not allowed.

Procedure
Check your entries. You can achieve the result you want by definingdepreciation area &V2& so that it adopts its values from the same area,from which depreciation area &V1& adopts its values.