Doing the classroom render right

Hi there, I’m trying to render the classroom image that comes as part of the Blender Benchmark. What is the “right” way to render it so all assets show up in the final image? Right now, I render it like this:

blender.exe --background --factory-startup -noaudio --enable-autoexec --engine "CYCLES" classroom.blend --render-format "PNG" --render-frame "1" 

But I don’t get the final image. I get a classroom missing assets like the chairs. I notice that these are separate files in the scene, but how do I get it all in one image?

There’s an incompatibility in the way Blender 2.80 handles collection instances compared to 2.79. There is an updated version of the classroom file here:

Ah I see, thank you so much!