couldn't run EDA simulation library compiler - couldn't run EDA simulation library compiler Dear Support, I am learning how to use Quartus Pro, under tools-> launch simulation library compiler, I filled the executable location correctly. I confirmed that the vsim is there. but the tools keep asking me to "specify the simulation tools executable location. this really confuse me. please give instruction/hint how to set up the location correctly. the Quartus is 21.3. the Questa is 2021.04. thank you David Sun Replies: Re: couldn't run EDA simulation library compiler Hi @Eifel was the problem solved?if yes please could you share the solution? Regards, vetri Replies: Re: couldn't run EDA simulation library compiler Hello! I have the same problem. Sorry for such a question What's the IP variation? How can I recompile it? I think my simple project doesn't use any IP cores if that's the problem. Replies: Re: couldn't run EDA simulation library compiler Since the issue had been solved, I close pending it. Replies: Re: couldn't run EDA simulation library compiler the problem is the IP variation is not using the original IP name. just recompile the original IP with simulation enabled. will solve the problem. Thanks, David