How to resolve theses errors

Hi,

These two previous forum links below probably will help you out:

https://community.intel.com/t5/Intel-Quartus-Prime-Software/Can-t-open-project-permission-error/m-p/1356717

https://community.intel.com/t5/Nios-V-II-Embedded-Design-Suite/Error-Can-t-Open-project-Quartus-II-6-0/td-p/62235

Try to remove all files those are temporary or generated automatically or NOT changing the file directory of where the project is saved.

For compilation Error (12006), make sure the Entity Module path is specified in Assignments -> Settings -> Libraries. Or include the Entity Module file into the GUI Project Navigator. Also, make sure the Entity Module file name is the same with the Module Entity name. As well to make sure include the Work library like below:

library work;

use work.<Entity_Name>.all;

...

u0: entity work.<Entity_Name> port map ();

Thanks,

Best Regards,

Sheng