Rendering Prob with MR & Lights
 

I'm trying to render my which has lots of lights
I'm using mental ray
and every time I try to render, it stops (saying that render is complete) but I have no file created
I checked upon the log and it says the following (for each light):

Warning: (Mayatomr.Nodes) : RLShape1.coneAngle: unsupported type of connection, current plug value used instead
Prog: (Mayatomr.Scene) : DAG node: BL2:coneShape2

?????????????????

what is it???


Appreciate any help