Tigger, do you have the TIR plugged into a USB hub? I have my old TIR 3 plugged into a USB port on my mobo, and I have only had my TIR quit mid-flight maybe three times, total, over the years.
Yup into a powered hub. Also tried directly in the computer makes no difference.
Here's my story. I have TrackIR4. Using the TIR4 software it worked fine almost all of the time. Every once in a rare while (maybe once every fifty times) the TIR4 software would crash on loading but if it didn't crash it was good until I shut it down. Loading the TIR5 software would produce random crashes.. sometimes a few seconds.. other times 30 minutes into it all. This persisted even after a hard drive upgrade (including a format/fresh install) and an upgrade from XP Home to 7 64bit, and a video card upgrade and even a power supply upgrade due to the old one that created a burning electrical small due to its fan controller failing (however the power supply itself still worked just fine!). I just assumed the TIR5 software was still buggy (with the TIR4 hardware) and since TIR4 acted up so rarely I didn't think much of it.
With the newest update to the TIR5 software I decided to give it another try. It no longer crashes and the software itself is much more stable however I have three problems with it. First, every once in a while Aces High doesn't 'see' the software running and I have to quit Aces High, quit the TIR5 software and reload both then it's fine. Second, every once in a rare while Aces High seems to "lose track" of it. In other words my TIR quits working in Aces High but the software is still running - giving me a green light on the camera AND showing everything is working fine in the software itself. To fix this I again have to quit AH, quit TIR5 and reload both to fix things. Third while it seems to increase precision and decrease background interference, the TIR5 software feels 'heavier' like it takes up more resources and has just a tiny bit of input lag as compared to the TIR4 software. Now that I'm used to it this lag doesn't seem to be an issue (honestly one would have a hard time calling it a lag at all it just seems a bit less snappier compared to the TIR4 software).
I've been using the TIR5 software for several months now but I think I'm going to go back to the TIR4 software and try things out... I just know I'm not the only one with issues with Aces High "losing" it's TIR and I know things get off kilter from time to time I just wish there was a way to reset things without having to completely quit out of Aces High altogether, hence the wish of a .resettir command.