Though oddly enough opening with reaper took a few tries, the only unusual thing about the file is the key signature parameter which I didnt even know midi could do.
I see that too but I had one midi called audio 4 which don't have the start on bar one and that one make Synfire hang, so perhaps the midi must start on bar one first beat! When I try export from Synfire, Synfire hang because one track was muted.
