While using an Akai Midimix controller, PD stopped working, and the message, "warning: MIDI timing FIFO overflowed" appeared on the console. What caused this? How can I prevent it from happening again? I'm using vanilla 0.56.5 on Windows. Most of the time it works fine, but this has happened a couple of times. I've got a live performance coming up in a couple of weeks, and I don't want PD to fail during the performance.

sounds like youre sending too many signals. you should print to pd window the midi out numbers and look at how many times youre sending numbers.