SAP Message AJ498 - Error determining meter reading

Diagnosis
This is an internal error.
In device &v1&, register &v2& a conversion factor (calorific value,volume correction factor or conversion fact) is equal to zero. This isnot permitted, as this factor is used as a divisor in GAS_FACTORS_ZW.
The gas procedure &v3& was used. The date is &v4&.

System Response
INCLUDE ISU_VERARB OBJECT DOKU ID TX

Procedure
INCLUDE ISU_SAP OBJECT DOKU ID TX