Diagnosis
On &v1& you changed from rate category &v2& (that bills with dynamicperiod control from basic category determination of current periodsby meter reading results) to rate category &v3& (from categoryestimation of meter reading results in billing). However, a ratecategory change like this is only possible directly after dynamicbackbilling with an actual meter reading result.

System Response
Processing is canceled.

Procedure
Change the rate category after a dynamic backbilling.