Hi Divya,
I have removed OEM (Material group) and Region and tried its giving same Mutiple value error.
Now I have Cal year/month,Material key/Material,Plant and 3 KPI's in the Query (Bex) and WEBI.
If its working for your, I guess I am not applying sum correctly. So below are the steps I followed:
1. Create 2 dimension variables as given by you
DIM1=(If([Cores - Returned]<0 Or [Cores - Not Returned] <0;0;[Cores - Returned]))
DIM2=(If([Cores - Returned]<0 Or [Cores - Not Returned] <0;0;[Cores - Not Returned]))
2. Dragged Cal year/month, 2 New Dimensions and clicked on Column (not header) and Applied sum in formula bar above.
Thanks for your help.
Regards,
Aditya