Create a SUS purchase order locally in SRM
we run a SRM 5.0 with SUS installed.
I tried to create a PO locally as Purchaser with transaction type "SUPO SUS Purchase Order".
It now says that "transaction type SUPO must not be used for object type BUS2201".
Does my error belong to
(1) I cannot create a SUPO order in EBP as a purchaser, but I would have to create this in MM?
(2) I made a mistake in customizing?
if (1): Is there any trick to locally create a PO to show the custome how it looks like?
if (2): What was my mistake?
Tanks for an answer
PS: I will for sure award points for help...