Diagnosis
As a rental agreement is assigned to a corresponding rental unit, therental agreement category has to match the rental unit usage type(commercial or non-commercial). The menu however specifies whether acommercial or non-commercial rental agreement should be processed.Here, the rental agreement category does not correspond with the menuoption though.

System Response
You have to make a correct entry.

Procedure
Enter a contract number with a contract category which corresponds tothe menu option or select the corresponding menu option.