Official SeeMusic support here
All MIDI files normally have an extension of .mid
Which application did you create your file in?
You can use SeeMusic to easily record MIDI from a connected keyboard.
I'll try all suggestions and get back to you
You can also try the trail ver. of Ableton Live 10 for 30 days for sure, It's free.
indidnt get your answer and right now I can’t afford to buy Ableton live 10
I think the app can only read the .mid file for sure.
.mid file actually is a MIDI file. So you import the .midi file is actually a MIDI file too, but the app does not support yet. I think the app will add it soon.
About your record app, I suggest Ableton Live 10 - which now I'm using to record many piece and is always export the .mid file. I think you should change the recording app to Ableton live 10 (Which is I suggested) to fix the problem.
Hope this is good for you! I hope your problem will fix as possible!!! (Actually I'm not visualmusicdesign :D)
Can you take the screenshot of the file?