In AE I have a 3D tracked scene, a 3d camera, a 3d null and Ive set my ground plane and origin. When I export the scene to Cinema 4D and try to open that file I get the error "unknown file format" Both AE and C4D are up to date (AE CC14 and Cinema4D Studio R16) Ive also tried opening in R15 with the same result.
OSX Yosemite 10.10
Mac Pro (Late 2013)
Processor - 3.7 GHz Quad-Core Intel Xeon E5
Memory - 12 GB 1866 MHz DDR3 ECC
Graphics - AMD FirePro D300 2048 MB
Thanks in advance for your help
Have you updated your C4D to v16.0.54 and thus also updated the relevant AE plug-ins? If not, do so and double-check everything to get things aligned version wise.
The latest version of cinema 4D is R16.027. Everything is up to date