Why does the co-simulation time decrease drastically if the ModelSim time resolution is changed from 1ns to 10ns in Link for ModelSim?

I am doing a co-simulation with ModelSim and Simulink. If I change the ModelSim time resolution from 1ns to 10ns, it causes a massive slowdown in performance. The simulator appears hung, although it will eventually complete.

Answer 1

[MathWorks Support Team]

This bug has been fixed for Release 14 SP1 (R14SP1). For previous releases, please read below for any possible workarounds:

We have verified that there is a bug in Link for ModelSim 1.1.1 (R14) when the ModelSim resolution setting is 10ns or 100ns. To work around this issue, use 1ns for the resolution setting.