Hi there,

Thanks for taking the time to report your problem.

One possible cause of unmet dependencies could be corrupted package
database, and/or some packages weren’t installed properly. To fix this
problem, hit Alt+Ctrl+T to open terminal and try to run one of the
following commands:

sudo apt-get clean

or,

sudo apt-get autoclean

apt-get clean clears out the local repository of retrieved package files
(the .deb files). It removes everything but the lock file from
/var/cache/apt/archives/ and /var/cache/apt/archives/partial/.

apt-get autoclean clears out the local repository of retrieved package
files, but unlike apt-get clean, it only removes package files that can
no longer be downloaded, and are largely useless.

One of the most basic fixes to resolve dependencies problems is to run:

sudo apt-get -f install

The -f hare stands for “fix broken”. Apt will attempt to correct broken
dependencies. If you manually installed a package that had unmet
dependencies, apt-get will install those dependencies, if possible,
otherwise it may simply remove the package that you installed in order
to resolve the problem.

Then run:

sudo dpkg --configure -a

Then run this again:

sudo apt-get -f install

If the output is:

0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.

That means it failed.

Please let us know by updating this bug when you've attempted the above.

** Package changed: ubuntu => aptitude (Ubuntu)

** Changed in: aptitude (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1039740

Title:
  software catalogue broken cannot install apps

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