Trying to change color on mesh object using particles

[Viper]

Working perfectly here.
Attaching you simple scene... just hit render 

Again, did you use your object in any way in Tyflow (that could explain dependence error).
If so, don't overcomplicate with caching Tyflow, and other stuff, just clone your object, and use it like this:
1) Object A - used only within Tyflow (non - rendrable)
2) Object B (clone of A), use it for render, and apply that Vray mat with distance texture shader.

Thank you for your file. Your file confirmed that this is possible and I tried to solve my setup. I made a copy of my current tyFlow and I was able to add new tyFlow to VRayDistanceTex map. The original tyFlow is still not working. It looks like if mesh object was used in tyFlow once and even if I delete operator where it was used this tyFlow is already marked as not allowed to use anymore. I could say this is a tyFlow bug. I will send a message to Tyson.