Black slots in material editor (2008)

Suddendly all the slot of the material editor went black.
I tried to reboot everything.
The slot are ok when in Scanline mode but they all turn black whne choosing Vray render.
(Using 2008 + 1.50sp3a)

umm

that usually happens when your license server isnt launched. Doesnt see Vray so the vraymats become black.

Another possibility may be that you have unlocked the material editor renderer from the production renderer.

Best regards,
Vlado

The problem disappear when I shut down another (rendering only) PC rendering aside.
There was certainely a license conflict between them.
It’s strange because the main license was running
and I was able to edit Vray rendering param
but not to see VRaymat…