I'm back on this ... because it is really an annoyance and I have browsed the web and hacked the registry but without luck ...
Here's the situation:
We use a playlist of Sonar projects for live shows which switch FX and digi mixer scenes ... on the main machine windows named the MIDI port "X-USB MIDI OUT" but on the backup it named it "2- X-USB MIDI OUT" ... so when transferring the projects to the backup machine, they will not work because when used in the playlist, each project prompts for reassigning a missing MIDI device (due to the different MIDI port names despite being the same device) ... so the only way to "fix" this is opening and modifying each project on the backup (which is time consuming and error prone and a hassle) ...
... it would all be so simple if Sonar would (A) address MIDI devices using their friendly names and (B) allow assigning a default MIDI interface to which all missing devices get assigned to (is there anything like this in some ini file)???
well, since I don't really believe in finding a solution, I might as well put in a feature request ...