External instruments stopped working all of a sudden

External instruments stopped working all of a sudden.

Have two external synths that noth feature onboard sequencers. Both connected over USB Midi. Both were working perfectly yesterday Did not change anything at all on my system, beside installing a windows update which I already rolled back. Both Synths do not receive midi start/stop from cubase anymore. This is working in ableton with no problem, so i guess it might have something to do with cubase. Tried to hook up a midi keyboard, is not recognized by cubase anymore either, was also working perfectly the last time is used it.

Hi and welcome to the forum,

Are you on Mac or Windows? If you are on Windows, be aware, there was a big update in the MIDI area recently. This might result in your issues.

Please, read this thread.

OK I figured this out.

Somehow cubase changed the settings I made in “project synchronization setup”
The former settings somehow stopped working, some got deleted entirely.
Tried different setups and found one that is functioning now.