On rare occasions, this system can malfunction (although it is usually an error on the part of the person submitting the work). If you have problems with electronic submission, do not modify the files to be submitted after the official deadline. Computers keep track of the last alteration time of each file. If you did not "touch" the files then, even if the submission failed, the time stamps on the files may allow us to verify that the work was done on time. If you do anything with the files, the time stamps are updated and you will lose proof that the work was completed at the earlier time. Please promptly send the instructor mail when any of these problems occur.