Diagnosis
No active schema steps were found for the period &v2& to &v3&. Possiblecauses are:
All schema steps are season-related. However, the season periods do notcover the whole billing period
You perform a period-end billing and the schema contains no period-endbilling rate
You perform a backbilling and the schema contains no steps which can bebackbilled

System Response
Billing is canceled.

Procedure
Correct the structure of schema &v1&.