1. go to studio.edx.org
2. search for MITx 6.341x Discrete-Time Signal processing (course ID: MITx/6.341x/3T2014)
3. click on "Re-run Course" button
4. After some processing time, receive the following error:
A system error occurred while your course was being processed....
Please note that I tried this 2 times and received the same error.