Diagnosis
Different check classes were found for the register in installationsV1 and v2 for the period from v3 to v4.

System Response

Procedure
Maintain the rate types: ensure that the check class is the same forall installations in which the register is installed.
Note the following:
The check class is dependent on the rate used to bill the register inthe individual installations. You must therefore ensure when enteringthe rate types that the resulting rates contain the same check class.