are you trying to post to a storage type which is HU managed ? Then you must create HU line in the PI document then system should ask you to enter HU number and packing material and post qty inside the qty.
It seems like you try use EWM MFS standard functionality but doesn't align with physical activity. A crane/resource can process only one warehouse task/order at a time. But you would like to send/process multiple orders on the same resouce at the sam...
