Diagnosis
When calling the detail display of planned/actual key figures for amaterial, an incorrect system setting meant that a selection variantwas used which led to an error accessing the information system.
In markdown planning, two selection variants are needed to read actualvalues from the information system and compare the planned figures fora markdown plan. You can maintain these variants in Customizing andmust always give them the indicators MDFV1 and MDFV2.
The system uses MDFV1 to read the stock key figures from the assignedstock information structure. These key figures are displayed in theheader of the detail screen.
The system uses MDFV2 to read period-specific key figures from theassigned information system. These key figures are displayed accordingto price phase in the items on the detail screen. The informationstructure defined in selection variant MDFV2 must have the period split'week'.
The information structure you used does not have the period split'week'.

System Response
You can only split the price phases for the key figures into weeks. Asa result, you cannot branch to the detail display.

Procedure
In selection variant Customizing, assign aninformation structure which has the period split 'week' to selectionvariant MDFV2.