You know what? You're right. :-)

I misled myself, because originally I neglected to specify root_path when calling init_datastore_v3_stub and I got the index error. I researched for a solution, and concluded it must be because I wasn't calling SetupIndexes so I called that and it still didn't work. So I added root_path, and it worked. But I forgot that maybe I didn't need SetupIndexes after all.

Thanks. Do you want me to update my pull request, or will you?