nios2 eclipse an error has occurred. - nios2 eclipse an error has occurred. I deleted my workspace file to recreated the project, but when I attempt to start up the Nios II IDE, I see the splash screen, then a small dialogue box appears, saying: "An error has occurred. See the log file C:\User\user\.altera.sbt4e\18.1.0.625-windows64\configuration\1603861355640.log" I also reinstall quartus, but it didn't work. (my environment: Quartus prime lite 18.1 windows10-64bit ) Hope any advice will appreciate. Replies: Re: nios2 eclipse an error has occurred. finally, I solve the problem. I deleted all files with the name of ''Altera" in C:\User directory. And reinstalled Quartus prime18.1. Replies: Re: nios2 eclipse an error has occurred. Hope this message can help. Replies: Re: nios2 eclipse an error has occurred. Before got this problem, I already built the Nios2 software project successfully. So I guess the problem is I deleted the project without close Eclipse.