SAP Message BEA428 - &1 &2: Error occurred when reading pricing document

Diagnosis
The system was unable to read the pricing document correctly forbilling document &v2& in the &v1& application. This might have beenbecause it is blocked.

Procedure
Check the pricing document and the current pricing procedure, and thentry to output the invoice again (menu path: SAP Easy Access menu ->Billing --> Edit Billing Documents.
If you are still unable to solve the problem, contact your systemadministrator.

Procedure for System Administration
Check the technical connection to the IPC pricing component.