Here is the link to the missing id error: http://www.smulearn.com/grade/report/grader/index.php. After reviewing that error, I ran the cron.php maintenance script under the site configuration area, but that didn't solve the problem.
After testing out all 4 of my courses in Moodle, what I discovered is that I can only post grade updates to the new courses as follows:
- September 2011 course: Grade updates receive error message
- January 21, 2012 course: Grade updates receive error message
- April 17, 2012 course: I can change or add grades
- new June 16, 2012 course: I just set up this course, added myself as a test student, and set up the 6 categories under the parent category and added a grade item for Intro to Law. Again, I can change or add a grade
Does anyone have an idea of why this is happening? The older courses have more data than the 2 newer courses.