Many of my students have Mathematica notebooks that they cannot open. I think that it's for the same reason identified in the other post with this title from July 2014. If you open a file, DON'T SAVE IT AS ANYTHING, do stuff, click X, then AFTER prompted "Save changes to "Untitled-1"?" you click save and name it; you will not be able to open it again.
My question is, now that it's 15 months later, has anyone figured out how to open those notebooks?
Note, I've tried the same procedure above in Mathematica 9, and the files open fine, so that bug was introduced in Mathematica 10.
bugs
tag is "reserved for questions where the problem has been vetted by this community and the observed behavior is confirmed to be a bug". Please don't add the tag to your own post until it has been vetted. (The previous post does not have thebugs
tag, so it doesn't belong here until the community has decided that it is necessary.) $\endgroup$