Diagnosis
There is no role defined with the Land Registry (TR0810) rolecategory in Customizing for partner roles, or there are no roles enteredfor the Land Register application.

System Response
It is not possible to assign a land registry.

Procedure
Correct your Customizing settings and define a partner role with theLand Registry (TR0810) role category. Choose:
Define BP Roles orMake Settings for Roles per Object Type