I have been trying to understand dynamic materials, and they have not been working for me so far, i have come across this issue where Set Vector parameter does not work because the node cannot find the vector parameter name in the list, on inspecting the material in the debugger the vector param has its name set in the info, but not the literal name value. This seems very likely to be a bug, but it is more than possible i could be doing something wrong. The material is just a simple setting of the color with a vector param called color.