does the midi device for TI disappear? (use the audio/midi app in mac osx)
I find that if the mac has been to sleep, and then I power up the TI, then initially the TI midi device will be present, but if i power up another USB device the TI midi device will disappear.
(it appears when the USB devices have change, and so are 'refreshed' the TI midi driver dies)
this can be fixed either by power cycling the TI, or rescan midi devices.
this was not fixed by 5.1.0 (was present before), and Ive been told by Access, they don't support 'sleep' mode, so basically they are not investigating the issue