SAP Message UPB_CCP017 - This planning function can only be executed in "plng absolute vals" mode

Diagnosis
You attempted to execute the planning function "Distribute first periodto all periods" in the planning of consumption values. However, thefunction can only be used in the planning of absolute values.

System Response
The planning function cannot be executed.

Procedure
Go to the "Planning absolute values" mode and execute the planningfunction again.