I have an odd situation with an "advanced uploading of files" assignment. The assignment is set up using separate groups with a due date far in the future. Students are allowed to delete and we have "send for marking" turned off.
There are about 100 students in the class, divided into lab sections for groups. Almost all of the students have submitted their assignments. You can see all the student uploads when clicking on "View X submitted assignments". For two students (in two different groups), there is nothing under "Last modified (student)", just as if they did not submit their assignment. However, when you click on the "grade" link for those students you can see a PDF file they uploaded. The files seem normal -- 2MB (well within the maximum file size) and no strange characters in the name.
I checked the activity log for each student and it does have an entry for them uploading a file to the correct assignment. The file is located in the proper place in moddata assignment folder under their user id.
I looked in the database and the students do not have entry in the assignment_submissions table corresponding to their user id and assignment id.
We are on Moodle 1.9.15. I've looked at other posts with similar problems, but they seem to be related to either a role problem or a database error. I turned on the highest level of debug messages and displayed the debug messages, but I don't get any errors.
There aren't any role overrides or special role assignments. As I said, all the other 90+ students' assignments are fine. If you upload a file and then delete it, there is a "Last modified" date in the assignment submissions view, but in this case, the box for "Last Modified (student)" is completely blank.
Any ideas as to what might be happening? It seems that the file is in the correct location, the grade popup shows the file, the activity log has a record of the file upload, but there is no record of the file in assignment_submissions.
Thanks for any ideas,