Thanks Joe. It took about 1.25sec when I tried the compiler option. This four-bar model is very simple comparing to my model. There are totally 4 kinematic loops in my model. If one kinematic loop will lead so slow calculation speed, the four kinematic loop will be much slower. I can not do HILS with Maplesim if the issue can not be solved.

Thanks Joe. It took about 1.25sec when I tried the compiler option. This four-bar model is very simple comparing to my model. There are totally 4 kinematic loops in my model. If one kinematic loop will lead so slow calculation speed, the four kinematic loop will be much slower. I can not do HILS with Maplesim if the issue can not be solved.