Apologies for bumping this, but I had the exact same problem just a few minutes ago, and I solved it.
As it turns out, on this system (RHEL 6.4, for the curious), /mnt was a symlink to /var/mnt. So when I made a mountmount in what I thought was /mnt/derp, and then tried to execute
, I got this error.
Once I modified /etc/fstab to change /mnt/derp to /var/mnt/derp, I was able to get it working.
also worked. I do not know why.
Apologies for the thread necromancy, but since this thread was the first link in a duckduckgo search, I felt I should contribute a solution.
TL;DR: check readlink to be sure your mountpoint is where you think it is..