SAP Message AXT_MODEL138 - Attibute tag &1 is not accessible from this BO part (BOL Object = &2)

Diagnosis The business object (BO) part that you have choosen to use for yourenhancement is associated with the BOL (business object layer) objectV2. the path from the this bol object to the attribute tag v1 isunknown, since there is no common object between BOL path &V3& to whichtag attribute &V1& points and the BOL object &V2&. Procedure Use a different part for your enhancement or find a different attributetag. If both are not possible, then you cannot use this tool for yourcase.