Kernel or program error?

[Bernt Hansson]

Hello list!

FreeBSD 10.3-RELEASE-p11 #0 AMD64

Sometimes I get this error when running pycam and the preview window is 
all messed up:

radeon: The kernel rejected CS, see dmesg for more information.

dmesg:

error: [drm:pid4089:radeon_cs_parser_relocs] *ERROR* gem object lookup 
failed 0x4
error: [drm:pid4089:radeon_cs_ioctl] *ERROR* Failed to parse relocation -2!

Maybe there is a better list for this question?