Mesh not exported

[csandl20]

Does anyone know why I get this error at the bottom about the mesh not exporte?

Successfully imported python module 'arnold'
Successfully imported python module 'mtoa'
pymel.core : INFO : Updating pymel with pre-loaded plugins: GPUBuiltInDeformer, deformerEvaluator, mtoa, renderSetup
Maya 2017 importing module pymel 1.0.9 (/usr/autodesk/maya2017/lib/python2.7/site-packages/pymel/__init__.pyc)
Successfully registered renderer 'arnold'
File read in 3.3 seconds.
Result: /root/farmhome/csandl20/camera_projects/scenes/camera_animation_06.ma
[mtoa.translator] ok_panelShape | Mesh not exported, it has 0 shading groups.
Error: line 1: [mtoa.translator] ok_panelShape | Mesh not exported, it has 0 shading groups.
Scene /root/farmhome/csandl20/camera_projects/scenes/camera_animation_06.ma completed.