Diagnosis
During the billing reversal of primary installation document &V2&, thefields ETRG-MAINDOCNO and ETRG-WAIT_BI must also be updated in thebilling order of the secondary installation that has the key (
installation, scheduled billing date,billing transaction) = &V1&.
An error occurred during this process.

Technical note:
The update of these fields is prepared in: BSW_BO_PREPARE (includeLEABCF01 ).
INCLUDE ISU_SAP OBJECT DOKU ID TX