SAP Message BEA804 - Item cat. &1: partner det.proc. not defined, "&2" tab cannot be displayed

Diagnosis A partner determination procedure has not been defined for itemcategory "&V1" for the billing document - this means that there is nopartner data for this billing item. Consequently, the system is unableto display any partner data. System Response Tab page "&V2&" is not displayed. Procedure If you do not wish to define a partner determination procedure forbilling items, you do not need to do anything. If, however, the partner determination procedure in item category &v1&is missing because the necessary information has not been defined forthis item category in Customizing, then you will have to go intoCustomizing for item category &v1&, and enterthe information that is missing.