Compressing hello.c... Compressed.
Uploading...... Uploaded.
Checking... server responded with status code 400. Try again later!

Why is the server not working when its checking mario?


You will receive that error if your appliance is not running version 19-2.

Be sure to run update50 first, as the spec says:

Even if you just downloaded the appliance, ensure that it’s completely up-to-date by opening a terminal window, as via Menu > Programming > Terminal, typing


and then hitting Enter on your keyboard. So long as your computer (and, thus, the appliance) has Internet access, the appliance should proceed to download and install any available updates.

  • but how can you run the update50? – Arsalan Khuwaja Jul 29 '14 at 23:24
  • I updated my reply to show the instructions. – curiouskiwi Jul 29 '14 at 23:26
  • thanks a lot! by the way, have you already taken cs50x – Arsalan Khuwaja Jul 29 '14 at 23:37
  • Yes, I completed the 2012/13 version of the class and have redone it this year so I could keep fresh (plus, there were new psets to try as well.) – curiouskiwi Jul 30 '14 at 21:13

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .