SAP Message VL507 - Synchronization not yet complete

Diagnosis
The distributed delivery was changed but the changes have not yet beensynchronized between the central system and the decentralized system.

System Response
The delivery cannot currently be changed.

Procedure
Repeat the activity later. If this error message occurs is displayedrepeatedly, inform your system administrator.

Procedure for System Administration
The delivery was changed either in this system or in the partner system.Check the IDoc inbound and outbound processing for errors.