Diagnosis
When a rental agreement is activated, the content of a key field(VIMI04-IMKEY) in the master data table (VIMI04) is transferred to theflow table (VIBEPP) so that the flow records can be assigned to thecorresponding agreement. The system, however, has detected that the keyfield for the agreement to be activated is empty.

Procedure
Inform your system administrator of the message number. The key mayhave been assigned incorrectly when the rental agreement was created,with the result that a new number cannot be generated.