Glad to see you again GLUO,
thanks for replying this post.
As for your question my answer is yes, I can run twin builder project alone, like simple circuit model, such as use sine and triangle wave to get the control signals for switches.
Actually I think this error results from some unkown settings of my localhost. I just tried my project on my supervisor's computer and also on my cloud pc, the same project works well. But this project cannot work on my laptop. I reinstall ansys electronics suite and also my laptop, this problem are still there.
I really don't know where is the root cause of this problem. It seems quite rare.
Thanks in advance for any solutions from you.