V-Ray: Invisible materials in Material Editor

[mtymoszuk_arch]

I have problems with Material Editor, I can create new material, add it to the scene. All works, material is visible during rendering BUT after closing Material Editor and opening again all materials looks like white spheres. All created materials are invisible, I must to pick them from the scene to see them here and edit. What's going on? What I should do?

I would be grateful for the answers.

[RobH2]

I know this is an older post. Did you solve it?

Is the path to the texture files in the 'Customize/Configure Project Paths' list?