The upgrader tool does not find a new Ubuntu release that is available

The output from the command says that it checked for a new version and could not find one, nothing about user settings being the reason for not reporting any new release, so it is obviously falsely reporting no new release.

This is invalid, it is disabled by default to show the upgrades to a non lts. To upgrade from a lts to a stable version of Ubuntu.
edit:
/etc/update-manager/release-upgrades

and change: Prompt=lts

to: Prompt=normal

and save the changes.

and then run do-release-upgrade

This bug has nothing to do with it being disabled by default. As I said before, the output falsely reports that there is no new release available. It says nothing about whether or not it is lts or normal. Giving false output is definitely a bug.

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1133078/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please answer these questions:

* Is this reproducible?
* If so, what specific steps should we take to recreate this bug?
* Could you paste the output of the command below to this report?

cat /etc/update-manager/release-upgrades

This will help us to find and resolve the problem.

yes, type in do-release-upgrade to recreate it.

# Default behavior for the release upgrader.

[DEFAULT]
# Default prompting behavior, valid options:
#
# never - Never check for a new release.
# normal - Check to see if a new release is available. If more than one new
# release is found, the release upgrader will attempt to upgrade to
# the release that immediately succeeds the currently-running
# release.
# lts - Check to see if a new LTS release is available. The upgrader
# will attempt to upgrade to the first LTS release available after
# the currently-running one. Note that this option should not be
# used if the currently-running release is not itself an LTS
# release, since in that case the upgrader won't be able to
# determine if a newer release is available.
Prompt=lts

Thank you for your reply. Your system has been configured to not update to newer releases expect LTS ones. Could you try replacing the lts by normal in the file /etc/update-manager/release-upgrades (either by opening with gksudo gedit or graphically with the software and updates tool) and try to upgrade again? Thanks in advance.

Done

Could you confirm if you ran the command below before running the upgrader tool? Thanks.

sudo apt-get update

I did run it. Is the message do-release-upgrade gives going to be corrected to reflect whether or not a release is actually available?

The upgrade tool should show the new version in that case and this bug will be fixed.