Conversion problem

[ArsenalRon]

Fairly frequently when I convert a song that I have recorded from my keyboard, Switch carries out the conversion, and then, right at the end of the procedure, I get a message saying that Switch has encountered an error and apologises for having to close! So I do not know if the song has been successfully converted or not! Why does this happen? It doesn't happen every time, so it cannot be that I am making the mistake.