Hello Simon,
You need the correct authorisation for the numberingserie or the B1i-user in SBO. If the default is configured you can better remove the xml-tag, the DI-API will add the default automaticly.
You can check your input, when you add some masterdata manually in the SBO-client and get the item with B1i (import/export mode).
You can validate your xml and/or fields against the XML which you will receive from B1i.
Best Regards Teun
