Windows 7, 64bit.
Maya2012 SAP.
I tried a 3-component test, and still got the same error, but I now have this in the EXR (according to exrheader) :
vec3_attr (type v3i): (1 2 3)
All other tests (int and float) doesn’t have any Extra Attribute in the rendered exr.
One thing I just noticed, I have no errors in the logs for the first frame.
The errors start at the second frame (I render the frames 1 to 5).
My scene is nearly empty : a sphere and a directional light (the sphere’s translation is keyed).
I render using a command-line :
render -r vray -s 1 -e 5 …etc…
Maybe this feature was not finished on 22nd October 2011, and I just need to upgrade.