When downloading a ZIP file from the Grade Center you receive an error similar to this:
HTTP Status 404 - /courses/1/sc1.1101/gradebook/9/16%20Assignment.zip
type Status report
description The requested resource (/courses/1/sc1.1101/gradebook/9/16%20Assignment.zip) is not available.
When downloading a ZIP file from the Grade Center, the file name is generated from the name of the Assignment. If the Name of the Assignment contains one of the following characters, it will result in an error when trying to download the Zip File. To avoid this error, remove any of the characters listed below from the Assignment name.
, \ ! / @ # $ % ^ & * ( ) > < ' "
Be sure to take a look at item No. 6 from 10 Things You Need to Know about Blackboard.
Video- Working Offline with the Grade Center