This error occurs if the selected ephemeris file cannot be loaded at program start-up.
The error message will mention the name of the damaged ephemeris file as de4xx.eph (where xx represent 2 digits that could be 05, 06, 30, or 31).
Solution
Run the application updater; during the update process any missing or damaged core files will be downloaded and re-installed.
Topic 180965, last updated on 13-Apr-2020