Camera Path - DR nodes work but only for one frame

[schroeder]

Have you guys been using Camera Path option and DR for calc'ing IR maps? When I try, it works ok but once the buckets go around once with all the slaves participating, the next pass the slaves all sit idle. Like they think they're done or something. What's weirder is that when I press "cancel" the vray info window shows them all saying "Server 192.168.XX.XX starting frame N" then it calls prePassDone on irradiance maps and stops the render.

Why do they just stop participating like that?