SAP Message CACSELT034 - Package CACS44 must be active

Diagnosis
If you have selected the packages for settlement scheduling(CACS25) and entitlement and liability transfer (CACS41), youmust also have activated the interface package CACS44. This package lets entitlement and liabilitytransfer access the items of settlement scheduling.

System Response
An error has occurred; the document will not be posted.

Procedure
Check what packages have been selected for the application. You need toselect package CACS44 as well as packages CACS25 and CACS41.