SNP optimizer errors

Hi all

When I run the optimizer Iam getting the following errors

There is no Demand Defined(but Demand exists in the planning Book)

Product not assigned to a Location(But Product is assigned to a Location in Product master.Location Product is also Defined in Supply Chain Engineer also assigned to a Model)

Location No products assigned(But Product is assigned to a Location in Product master.Location Product is also Defined in Supply Chain Engineer also assigned to a Model)

Total no of Demands:0

Total no of PPMS/PDS:0

PPM/PDS not defined(PPM/PDS is defined heuristics run happened successfuly)

could any one guide me in this regard even after Demand exist Iam getting error Demand is NOt Defined

Thanks

Poorna