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IOAudio Drivers & kextload/unload

Hello,

I would like to take advantage of the dynamic loading/unloading capabilities
of OS X, but am getting the following error message when trying to unload my
audio driver (which is based off of the SamplePCIAudioDriver example):

Mach_kernel: Can't unload IgniterAudioDriver due to - IgniterAudioDriver:
IgniterAudioEngine has 1 instance(s)

Other than logging out and unloading the driver (which does unload the kext)
is there a way to force the driver to unload.

I am considering creating a user interface client call that will kill the
instance of the IgniterAudioEngine so that I can successfully unload it with
kextunload, but was wondering if there was an easier way.

Thanks,

Tim
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