Hi,
but in standard the ERP inbound delivery also does not take into account the status of the shipment cost document or the shipment document either, doesn't it? So you can alway post GR, whatever you have done with the shipment document or not.
So actually I think with the EWM integration you even have a stronger possibility to control the GR posting, that is by sending the IDOC from ERP to EWM for the creation of the TU only once the billing document for the shipment document is created.
Brgds
Juergen