Error 5 on Rigs of Rods

[EmeraldStarZX211]

I can find several ways to fix this error on http://www.rigsofrods.com/wiki/index.php?title=Error_5#BillboardSet::setMaterialName. What must I do to fix the problem here?

[Stephen Hopkins]

try one if not all of those.

[EmeraldStarZX211]

All authors of all monster trucks, the computers require all the monster trucks to be complete, or I can't run them at all. If all of you can complete all the monster trucks you have produced for this program so far, I would appreciate it very much.