Diagnosis
You want to perform an advance billing with periodic billing. Theadvance period was determined from &v1& to &v2&. This is not a validinterval.
The end of the advance period (&v2&) was determined from the schedulerecords of meter reading unit &v3&.

Procedure
Make sure the schedule records of meter reading unit &v3& areconsistent.
If necessary, manually adjust the schedule records.
Also check the schedule records of the allocated portion, &v4&.