Error when updating server to 17.04

Question

I'm working on updating a staging server to the latest version of ubuntu. I'm running into an error that I can't figure out...

When I run

do-release-upgrade -d

I get the following error

ERROR:root:parse failed for ‘/var/lib/update-manager/meta-release-lts-development’
Traceback (most recent call last):
  File “/usr/lib/python3/dist-packages/UpdateManager/Core/MetaRelease.py”, line 368, in download
    self.parse()
  File “/usr/lib/python3/dist-packages/UpdateManager/Core/MetaRelease.py”, line 239, in parse
    while index_tag.step():
SystemError: E:Unable to parse package file  (1)
Upgrades to the development release are only 
available from the latest supported release.

Does anyone have an idea of how to resolve this issue?

Update:

I've discovered that the server is looking for a file called meta-release-lts-development, which doesn't exist (only meta-release-lts, which has only official releases). Not sure what to do with that information, but might be helpful...

Output of update-manager -c

Failed to connect to Mir: Failed to connect to server socket: No such file or directory
Unable to init server: Could not connect: Connection refused
Failed to connect to Mir: Failed to connect to server socket: No such file or directory
Unable to init server: Could not connect: Connection refused
/usr/bin/update-manager:28: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk
WARNING:root:can not import unity GI cannot import name Dbusmenu, introspection typelib not found
Failed to connect to Mir: Failed to connect to server socket: No such file or directory
Unable to init server: Could not connect: Connection refused

Solution

If do-release-upgrade fails, you might need to edit the release-updates file. Open that file with a text editor (e.g. nano) nano /etc/update-manager/release-upgrades Edit the last line to say:

Prompt=normal

Then run do-release-upgrade (without the -d flag)

When the upgrade is complete, edit that line again to say Prompt=lts

Comments

[Pilot6]

What is the current version? If it is 17.04, it is "the latest".

[Jillian Hoenig]

@Pilot6 the version we're running now is 16.04.3

[Pilot6]

Then run do-release-upgrade without -d. If a distro is not found first run update-manager -c.

[Jillian Hoenig]

What does update-manager -c do? I can't find documentation on it..

[Pilot6]

Where are you looking for "documentation"? Run man update-manager.

[Redbob]

Verify at update-manager settings if it is assigned to receive only LTS updates, so it will not find any update to 16.04.

[Jillian Hoenig]

Hm, update-manager -c returns errors - Failed to connect to Mir etc. Is there another method?

[Vignesh T.V.]

Works well. May I know what does this do though?

[rosch]

@vignesh this has the update-manager look for all new distribution versions instead of only lts (long term support). You can also set this in the GUI through the update-manager.