SAP Message 63106 - Settlement unit does not exist or is inactive

Diagnosis
A settlement unit is made up of the combination of recipient andservice charge keys. Both recipient and service charge keys may becreated independently of one another, but their relationship definesthe settlement unit.
You must enter an existing settlement unit here to collect (transfer)the costs determined by settlement companies.

System Response
The F4 selection in the "Recipient key" field displays a list ofdefined settlement units for the heating system (BE).
The F4 selection in the "Service charge key" field displays a list ofpossible entries.

Procedure
Enter an existing settlement unit.