SAP Message B1123 - No assignment for & company code & to a & company code.

Diagnosis
No allocation was found for the &v1& company code &v2& to a &v3&company code.
ALE uses global company codes from the financial accounting module.Global company codes can be maintained and allocated to company codesthere.
On the sending side each company code in an intermediate document isreplaced with the allocated global company code.
On the receiving side the reverse process takes place. The globalcompany codes in the intermediate document are converted to theappropriate company codes.

Procedure
If the company code is being used as a filter object for this messageflow, you should check whether the global company codes specified arecorrect.
Maintain the missing global company code or the missing allocation to acompany code as necessary.
To do this you can, for example, use the activities of the IMG point
Cross-application functions -> Distribution (ALE) -> Distributionscenarios -> Global organization units -> Setting up global companycodes.