ISSUE: Other issues affecting a single exercise

Description

Any other issue affecting a single exercise.

Cause

N/A

Solving the issue

1. Copy all student code to a safe place. Do not copy non-student files from the exercise.
2. Remove/rename exercise folder
3. Restart NetBeans
4. Download the exercise again
5. Check that the exercise works
6. Copy back all student code
7. Notify developers about issue