Tire Contact Point Modification applicability

Vehicle Modelling
1

We have a Tire Contact Point modification model, implemented as an FMU and applied to the tire model with the line:
TireCPMod.Kind = MyModelContactPatch 1

Most of the time the FMU updates the tire contact point as expected, but for a couple of tires (using a tire model provided by Tass and already incorporated into CarMaker) no effect is seen.

Are there cases where a ContactPoint Modification model will not work with a Tire model?

2

In case anyone else has this problem - the answer, we found, was that the communication point in the FMU was not being advanced so nothing happened. (The FMU was based on the official examples for FMUs.) The solution was to update the FMU to ignore time considerations and automatically advance the communication point.