Demantra baseline forecast is zero for a few months in a year

Hi All,

We are running the PE engine in batch mode, we can see the consistent demand at the node for all months for past 104 weeks. Still engine generates a zero baseline forecast for a few months (Jan, May, Jul,Aug) in all years (2016,2017,2018) for such combinations while for rest of the year it generates a good enough forecast numbers for the same combinations.

For many other combinations it generates baseline forecast numbers for all months. can anyone please point at possible reasons for this?

Thanks,

Tanmay