Diagnosis
When schema &V2& is executed, an update takes place in step &V4& usingregister operand &V1& from step &V3&. However, step &V4& has alreadybeen supplied with the consummption or demand of the registersallocated to the rate concerned. Therefore, the update in step &V4& isnot permitted since the register information of the step would be lost.

System Response
The billing is canceled.

Procedure
Change the structure of the rate concerned.