SAP Message BBP_CT_SLS305 - Business partner &1 is not assigned to a distribution chain

Diagnosis
You want to copy a distribution chain specific set of product &v1& inaccordance with import rule &v2& for an imported product. The importrule stipulates that the copy is stored under the distribution chain ofthe sending business partner &v3& rather than the original distributionchain.
Business partner &v3& is not assigned to a distribution chain.

System Response
It is not possible to copy the set.

Procedure
Check whether the import rule &v2& is correct for the combination ofimport reference product &v1& and business partner &v3&, or assign thebusiness partner to a distribution chain.