SDK Error: "No warehouse specified for warehouse item"

SOLVED

Integrating Sales orders into Evo via the SDK. I am getting an error: "No warehouse specified for warehouse item"

This is for all Item numbers. It looks like all products are loaded to warehouses, I have not seen this error before when posting orders in this way. What could be the cause? Any ideas on how to correct it? I am guessing this could be a setting in Evo?

Regs

Dyl