CodeRunner Documentation (V3.3.0)
2.1 Upgrading from a CodeRunner version earlier than 2.4.0
The current version of CodeRunner is incompatible with versions prior to 2.4.0. If you're attempting to upgrade from an earlier version, you should first upgrade to the most recent version 2 (checkout branch V2 in the repository). That will upgrade all questions in the database to a format that can be handled by current versions.
If you are already running CodeRunner version 2.4.0 or later, you can upgrade simply by following the instructions in the next two sections.