Trying to find documentation, any documentation on Motion Capture Export

I have created an animation in Blender, and I want to export the animation for use in Second Life. I see that Blender now includes a Motion Capture export option, however every time I use it I get an error message about a variable not being defined. I am hoping someone might know of a tutorial, any tutorial, that discusses the use of this function. I would be grateful for any leads you can provide. I’ve asked Google, and so far Google seems stumped, only pointing me in the direction of a third party script released nearly four years ago which no longer seems to work.