XDCAM HD422 and "Invalid Track Layout for Asset"

Could we get the FCPXML for your Project, please?
Also could you send us a screen capture of your configured media locations.

We're cutting a doc TV hour in FCPX (fully up to date) using MANY camera formats. (RED, C300, XF etc). Some double system, some direct audio into one of the cameras. Different frame rates on some odd shoots but mostly 23.976.
I am doing workflow tests and checking paths to post.
We currently are testing X2ProLE but will probably get the full version if we can confirm it's right for us.
There's a composer using Logic and a post mix being done on ProTools or Logic X waiting for us at the end (3 months away)

Getting "invalid track layout" errors on anything that has XDCAM HD422 sources in it.
Been able to export short early edits and check them out in Logic X. The ones that are built from basic clips seem fine although they were mostly XAVC intra 2k/4k. This afternoons tests with multicams of RED and C300 all throw up the error message of Invalid track layout in X2Pro Audio Convert LE window. The clip referred to in the error message is always an XDCAM HD422 clip.
I've tried exporting basic non-multicam clips on a simple project but
"Invalid track layout for asset AA038201

No AAF file has been generated."
still pops up.


Any suggestions?

Thanks
slickslack