[BUG][App Compat] MidiOX "There is no driver installed" Errors on x64 Windows, and then bugcheck

[Psychlist1972]

Release
Customer Preview 1
Canary 27788

When starting up MIDI-OX, I receive the following:

I clicked through 35 or so instances of that dialog, approximately corresponding to the number of Get Dev Caps errors reported by MidiDiag. It appears that MIDI-OX is throwing up the dialog on every failure return code in the non-contiguous WinMM Port indexes.

After that, when I clicked on number 36 or 37, my PC green screened with DPC_WATCHDOG_VIOLATION. I'm used to that from my old and failing MOTU 24 I/O.

I repeated this after restart, and had exactly the same thing happen, including the green screen.

The green screen does appear to be coming from the MOTU. Super odd that it's being triggered by this, though.

mididiag-2025-02-05.txt

[Psychlist1972]

Documenting this here, but for the dialogs to go away, MIDI-OX would need to change their code to not display an error for an inactive port number. There's no reason to display that for each port.

[Psychlist1972]

We are going to go back to using contiguous port numbering, which should fix the "no driver" errors during initial enumeration in MIDI-OX