I have a big problem with pset2. I got 0.5 although both programs (vigenere and ceasar) work fine when I test them on my own, without check50. I got 100% for vigenere, and 0% for ceasar. Do you know what could have happened? I used update50. Every time I type correct ID for ceasar, after several seconds, "Invalid ID" appears. Help me, please.

1 Answer 1


Make sure you spell caesar correctly. You need to name your .c file caesar.c and then use that in check50 as well

check50 2014/x/pset2/caesar caesar.c

If you named it something else, then it will get a 0 grade because check50 (the grader) is expecting a file called caesar.c

  • I can't believe it - I mixed the letters :p Thank you very much :)
    – mimik00
    Jul 22, 2014 at 0:23
  • When you resubmit your code, make sure you submit both programs again (caesar.c and vigenere.c) as the submission is graded as a whole. in other words, don't just resubmit caesar.
    – curiouskiwi
    Jul 22, 2014 at 0:24
  • I just resubmitted both programs. Hope, I'll get 1.0 :)
    – mimik00
    Jul 22, 2014 at 0:28
  • Hope so. Please 'accept' my answer by clicking the checkmark next to it. That will help others know that the question has been solved. Thanks!
    – curiouskiwi
    Jul 22, 2014 at 0:30

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