ContributionsMost RecentMost LikesSolutionsRe: ERROR: Unable to checkout a license. Vsim is closing. Hello! I got the solution for this problem. I created a small video that explains how to obtain a free licence from Intel and how to set environment variable to get Questa running. See more on my YT channel : Watch on YouTube - How to fix Unable to checkout a licence. Cheers 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.