SAP Message B1478 - No logical system name has been defined for client &

Diagnosis
It has been determined that the logical system name &v2& has beendefined for source clients but not for the new client &v1&. In thiscase there may be documents that have been created in source clientsunder &v2& which cannot be found any longer in this new client.

Procedure
You can define a logical system name for this new client and then startthe translation tool manually online.