Actually I wanna use this scenario in subcontracting process.
we are implementing SAP in our Subcontractor place. i read in sap doc that subcontractor should receive material for sales order stock. so components we send them is attached to a sales order. in this way we can distinguish them with materials the purchase from other vendors themselves.
thats why I wanna use 101/E.
today I tested purchase order with account assignment E but the error message changed.
new message is about Sales order number I entered in PO. I asked SD consultant to solve it.