TU creation in EWM using ECC Shipment

Hi All

Can someone help me with correct steps to create shipment in ECC which can create TU in EWM using standard IDoc interface?

I followed steps as per help.sap, integration between ECC & EWM is fine. I could see the shipment IDoc in EWM but it is getting failed. After debugging I have realized that I should not pack HUs into Container while creating shipment in ECC.

But is that correct process?

Thanks

Sasidhar Gupta