13.1 Quartus II software compilations do not generate .mif

Description

When upgrading the Quartus® II software to version 13.1 or beyond, or cleaning the database of your project, the software might not compile a revision that generates a .mif if the revision has a different name than the project. This failure might not occur until the second compile.

Resolution

Delete the db and incremental_db folders in your project directory, open your project in the Quartus II software, and set the revision with the same name as the current project. If the project does not contain a revision with the same name as the project, create this revision. You can now compile any revision normally.

This problem will be fixed in a future Quartus II software release.