I'm developing a web application with an embedded Word iframe that interfaces with an Office Web Apps server; I am trying to implement the MS-FSSHTTPB protocol for my WOPI server. More details here. When I send a bad response back to the OWA server it stops making requests to the WOPI server and sends the following error message back to the browser client: "Sorry, there was a problem and we can't open this document. If this happens again, try opening the document in Microsoft Word."
Is there a way I can get additional information about what went wrong so that I can correct it?