Try each of the following steps in order until the error is resolved

    1. In Configuration, click Registrar Setup and highlight Translations Tables.
    2. Open the translation table used in the GPA calculation.
    3. Select View, GPA View from the menu bar.
    4. Complete all the appropriate values for the grades and GPA type used in the calculation 
    5. Order the Grades and GPAs in Descending order by the numeric and GPA equivalent
    6. Mark the Include in GPA calculations checkbox.
    7. In Records, click Courses, Open selected course.
    8. Open courses for which GPA should be calculating.
    9. On the Grading Tab, open the grading year for calculation.
    10. In the Include this course in the following GPAs section, specify selected GPAs to include this course.
    11. Save and close course record.
    12. Repeat for each course.

    For more information, refer to How to define translation tables (BB135868)