Diagnosis
Billing due list item &SYST-MSGV2&/&SYST-MSGV1& is to be billed bydifference calculation. The billing header of the billing document forwhich the difference should be calculated, cannot, however, be read.

System Response
The billing due list item cannot be billed.

Procedure for System Administration
The cause for this could be a program error or data inconsistency.