Output from Vendor Billing Document in material vendor rebates

[jonathan_spencer1]

Hi

I am working on Material Rebates and have progressed as far as generating vendor billing documents via subsequent settlement. I can see the vendor billing documents in tcode wlf3.

I want to produce output (printed or email) from the vendor billing documents that will detail the purchases that go to make up the amount of the vendor billing document; but when I attempt to create output messages from wlf3, I am getting the error "No message determination schema is entered in Billing Type BM31"

In my experience, SAP usually provide a sample output type as standard which we can then copy and modify; but in this case there is no output type defined at all.

Can anyone provide detailed guidance on what we need to do in order to produce output?

Thanks