Custom Target System - AdHoc Projection

Hello,

we are running 9.1.1

We are in the phase of connecting our first Custom Target System. It´s coupa and the connection is done via Starling connect. Connection seems working so far. Now I want to use some AdHoc projection, so I don´t need to wait until the sync is done. For me it´s a bit hard to build it so I wane ask, is there any Code snippets or manuals how to build this? I was looking how the AADUser Adhoc projection was build and tried to use that for UNSAccountB with some modifications, but it freezes Disappointed

Any help would be great.

The Error btw: [810156] Error generating parameter UID_DPRProjectionConfiguration.

Best, Denny