Diagnosis
When determining meter reading results within dynamic period control,and there are no estimated meter reading results on the database (thecategory of the current period = 3000 or 4000) an error occured inroutine IZWST_EXTEND_FOR_VOR (LEA01F02) for period &V1&- &V2& that isto be created. The exact cause of error is written in the previousmessage and occured in function module ISU_SIM_IZWST_ESTABLISH.

Procedure
Check the meter reading results for the installation. Contact SAP ifyou cannot correct the error yourself.