SAP Message AJ592 - Net lines for the gross price are missing in gross group &4

Diagnosis
INCLUDE ISU_BI_GROSSPR_MSG OBJECT DOKU ID TX

System Response
INCLUDE ISU_VERARB OBJECT DOKU ID TX

Procedure
Check to see whether, by mistake, one of the prices was not processedas a rental price at device level.
If the problem persists, contact SAP. Include the following data inyour message:
Billing document,,&v1&
Gross group,,&v4&
Gross price/Document line item,,&v2&
Net price/Document line item,,&v3&