When using either the Assignment Tool, it is important that you do not use a # symbol in the file name. You must rename your file so it does not have a "#" symbol. For example, instead of sending a file named "Quiz#1" use a name like "Quiz_1."
Do not uses special characters that can be interpreted as HTML code (#, &, %, @, <, >, ^ etc.) and will keep your instructor from being able to open your file.