Diagnosis
The transaction currency of item &V3& has expired, meaning that it is nolonger a valid currency unit for business transactions and accounting.However, no exchange rate is defined between the expired currency unitV1 and the replacement currency unit v2.

System Response
No billing document could be created for transaction &V4&.

Procedure
Contact your system administrator.

Procedure for System Administration
Enter currency exchange rates in Customizing for SAP CRM, under SAPNetWeaver -> General Settings > Currencies > Enter Exchange Rates.