No bin search possible. Storage types/sections/bin types incomplete

Getting this error while creating warehouse task for inbound.

I did the storage type search, section, bin type and HU type search. Also assigned the PTDI to WPT.

In this case the  HU has two different products in it going to two different storage types. But when i create inbound with one product and one HU going to one storage type - it successfully creates WT. Its only when i have the two products in one HU it wont create a put away WT.

What could be the reason that it creates WT when HU and product is one to one but when multiple products in a single HU - it wont create WT.

Thanks