SAP Message B1803 - No function module has been assigned to the business object type &

Diagnosis
The function module has not been assigned to business object &v1& inthe distribution model. The function module name is required todetermine the receiver of dependent message types.

Procedure
Assign the name of a function module to the business object in thedistribution model. Using these names the values of filter objects inthe master record of the object can be read.