Rapid re-Compilation -> design database is not found - Rapid re-Compilation -> design database is not found Hi All, While a Rapid Recompilation I'm receiving the following error: "Error(20279): Rapid Recompile could not locate a design database from a previous compilation on disk. Perform a successful Full Compilation before requesting Rapid Recompile and make sure intermediate snapshot writes are enabled with the Enable Intermediate Fitter Snapshots assignment" This error appears every time I'm trying to do a Rapid Recompilation. What's the problem? Why Quartus cannot find the design database from the previous compilation? Thank you! Replies: Re: Rapid re-Compilation -> design database is not found I’m glad that your question has been addressed. With that, I will now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you. Best Regards, Richard Tan p/s: If any answer from the community or Intel support are helpful, please feel free to give Kudos. Replies: Re: Rapid re-Compilation -> design database is not found It seems that sstrell have provided the answer to your inquiries. Do you need further help in regards to this case? Replies: Re: Rapid re-Compilation -> design database is not found 2) Yes, exactly. 3) Assignments -> Settings -> Compiler Settings Replies: Re: Rapid re-Compilation -> design database is not found 1) I'm using Quartus Pro v19.3 2) "In recent versions, RR is really only for making changes to Signal Tap" - what do you mean "only changes in SignalTap"? Adding/removing signals, trigger types, etc? 3) "have you enabled Fitter snapshots before performing a full compilation" - how can I do so? Replies: Re: Rapid re-Compilation -> design database is not found First, what version of Quartus (Pro I presume) are you using? In recent versions, RR is really only for making changes to Signal Tap. Also, as the error states, have you enabled Fitter snapshots before performing a full compilation? They are disabled by default (for some reason).