Quartus 23.4 often fail to compile - Quartus 23.4 often fail to compile Hello everyone, I often encounter the following error when compiling with Quartus.: I can only keep trying to recompile, and sometimes I can succeed. May I ask what causes this? The software information is as follows: PS: The path where my project is placed also has no write protection restrictions. The fpga device is cyclone10 gx. Thanks a lot! Eric Replies: Re: Quartus 23.4 often fail to compile Hi , I copied the project to the root directory of a hard disk, and the probability of this error was greatly reduced. It might be caused by the fact that the path of the previous project was placed too deep. Thanks for your concern! Replies: Re: Quartus 23.4 often fail to compile Hi, Let me know if any further update or concern? Thanks, Regards, Sheng Replies: Re: Quartus 23.4 often fail to compile Thanks for your answsers, that's so nice of you, thanks! Replies: Re: Quartus 23.4 often fail to compile Thanks for your suggestions, I will try! Replies: Re: Quartus 23.4 often fail to compile Hi, I notice the error message points to some path. May be try delete that path folder or check .qsf is that any assignment points to that path (if yes try to delete it)? Thanks, Regards, Sheng Replies: Re: Quartus 23.4 often fail to compile You only have a single revision. You can't delete it if it's the only revision. As such, this is not the cause of the issue you're having. It looks more like your project is corrupted in some way. Create a new project, bringing over design files and adding any settings or assignments you've created into the new .qsf file. Replies: Re: Quartus 23.4 often fail to compile After select the revision the delete key is gray and cannot be clicked： Replies: Re: Quartus 23.4 often fail to compile Hi, Go to Project -> Revisions -> Select the revision -> Delete Thanks, Regards, Sheng Replies: Re: Quartus 23.4 often fail to compile Thanks for your answer, Sheng, Could you please tell me how to delete the revision? Do you mean I need to creat a new project? I created current project base on Qsys system, It will cost a lot of efforts if I recreat a new one, How can I solve this issue just base on the current project? Thanks a lot! Replies: Re: Quartus 23.4 often fail to compile Hi, You're create revision based on other Quartus version, that's why the error appears. Please delete the revision and re-create the revision using current Quartus version. Thanks, Regards, Sheng Replies: Re: Quartus 23.4 often fail to compile Hi Sheng, clean project failed as below photo: Replies: Re: Quartus 23.4 often fail to compile Hi, Or try to clean project? Project -> Clean Project Thanks, Regards, Sheng Replies: Re: Quartus 23.4 often fail to compile I'd test compiling on a different computer if available. The error you're getting doesn't have a reference message number and it's not an internal error causing Quartus to crash so it is very strange. If it still fails even on a different computer, there is something in your design that the compiler does not like. Replies: Re: Quartus 23.4 often fail to compile Thanks for your suggestion, I have reinstalled the Quartus, but it dose't work.... Replies: Re: Quartus 23.4 often fail to compile I'd try reinstalling Quartus or try bringing your design files into a clean, new project.