SAP Message 60531 - Business type & must be defined

Diagnosis
The processing of rental units or rental agreements is controlled usingthe business type. The asset form which is freely defined by the useris connected with this. The business type is required and musttherefore exist in the system. The system could not however, find anycorresponding business type.

System Response
The transaction is terminated.

Procedure
Inform your system administrator. You have to enter the business typesin table TZA37.