Diagnosis
The use of alternativehistorical data (AHD) for theforecast is active formaterial &SYST-MSGV1& and
plant &SYST-MSGV2&. Youcannot maintain alternative historical data (AHD) when you create amaterial.

System Response
The system cancels the action.

Procedure
First create the material and then use the appropriate program tomaintain AHD manually (transaction WAHD2).