"Warning: Unsupported texture VRayMtl" message, V-ray material swatches broken

[Richard7666]

Since about half an hour ago, working on a project all of a sudden I can no longer see swatches in the hypershade or in the material attributes. Everything just shows as black. When I try to refresh a swatch/click it in Hypershade, Maya just gives me a "Warning: Unsupported texture VRayMtl" error down in the status bar.
(They still show correctly in Viewport 2.0 though)

Now all projects have the same issue. Something between V-ray and Maya has gotten broken, any ideas? It's basically unusable in this state

EDIT:
I've found the problem. For some reason the Vray licensing service wasn't running, starting it fixed the issue.

Is there a list of things that won't work if the licensing service isn't running? Would make troubleshooting a lot easier!

[vlado]

Is there a list of things that won't work if the licensing service isn't running? Would make troubleshooting a lot easier!

There is only one thing that won't work - rendering No matter if it's a swatch or full render.

Best regards,
Vlado