Hi,
BOM Transfer ..? Please ignore my latest solution. I again got confused because I thought you wanted to avoid PR and Reservation number while attaching material component to N/W Activity. Furthermore, I request you to use proper tag line while posting the query which is relevant to your problem. "Assigning material component to activity w/o reservation" is no way near to BOM transfer and forum members could not have understood it properly unless you would have posted it like you did it now.
I am wondering how system is issuing PR/Reservation at the time of BOM transfer because I hardly feel that CN33 does that. You must have got your PR/Reservation before BOM transfer i.e at the time of attaching material component to N/W activity.
Regards,
Amit