When I try to open a project, Quartus opens and then closes itself

Question

I'm not fully sure why this is happening. I also think it's important to say that this is only happening for one of my specific projects. I am still able to open other perfectly.

Answer 1

It's possible that your project database is corrupt. Try deleting the following directories in your quartus project directory:

\db
\incremental_db

NOTE: deleting these directoires will force you to do a full project recompile. These directories are generated by Quartus at compile time, so you won't lose any of your project settings by deleting them. Project settings are stored in your <project>.qsffile.

Opening the project with a different version of Quartus will achieve the same effect as Quartus will not open a project built using a different version without deleting these directories first.

If that doesn't work, there may be a bad setting in your <project>.qsf file. This will be trickier to fix. You could make a fresh blank copy of the <project>.qsf and incrementally import settings (global assignments, source assignments, pin assignments, etc> and open your project until quartus fails, or just start over and redo all of your project settings if it's not a big project and the .qsf file is fairly simple.