Here are some possible reasons:

  • Campusnet has a file limit size of 5MB per each upload. If you are trying to upload a document that is larger than 5MB, you will need to edit the document, or contact your professor to determine what he/she would have you do.
  • The time for uploading has past. Contact your professor to determine what he/she would have you do.
  • There is only one upload allowed for that specific assignment. Contact your professor to determine what he/she would have you do.


Upload instructions:

If the professor has set up an assignment to allow students to upload files, you should see an "Add submission" button on the page after you select the assignment.  Here's an example:



When you click the "Add submission" button you will be able to drag and drop a file or click the file "Add" button to browse to the file you want to submit.