This is actually an issue with Hexler's qcOSC plugin. It's not related to the kinect/osceleton/drivers etc.
qcOSC can't open two of the same OSC ports at one time. This happens when you open a second composition with the OSC receiver in it. To fix quit and restart QC, and open one composition (with only one skeleton osc receiver) at the same time.
I don't think the image with kinect plugin could cause any conflicts with the tryplex patches. It can't be run at the same time though because the kinect can only accessed by one program any time.
Sebastian.
Another thing is that OSX standard generates previews for most files, including qc compositions. (meaning that it tries to run the composition inside the finder, tries to open qcOSC and that'll slow down your system as well) It's handy to put the files inside a folder where the generate preview option is turned off in the finder, of turn off the preview through your whole system.
If you get the message again, run only one composition using the osc receiver at a time, and quit/restart qc.
Sebastian.