Diagnosis
A usage type category is assigned to every rental unit. Thedifferentiation is made between commercial and non-commercial. Theusage type categories are stored in the table TIV01. However, an entryis missing from this table whose value is stored in the rental unit ofthe corresponding rental agreement

System Response
You have to make an entry. Further processing is not sensible.
Procedure
Inform your system administrator and give details of the rental unitnumber and the usage type category.