It won't let me install any software whatsoever. Says there's a programming error.

[Sketch Reed]

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 769, in simulate
    return self._simulate_helper(trans, status_path)
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 948, in _simulate_helper
    return depends, status, self._cache.required_download, \
  File "/usr/lib/python2.6/dist-packages/apt/cache.py", line 218, in required_download
    pm.get_archives(fetcher, self._list, self._records)
SystemError: E:I wasn't able to locate file for the tcl8.5 package. This might mean you need to manually fix this package.

[Sketch Reed (sketchreedartist)]

Can someone please help? I'm a cartoonist, and I'm literally stuck without Corel Paint Shop Pro Photo X2. I need to finish these comics, and without Wine, I can't. Anyone?

[Robert Roth (evfool)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect 709048
When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

Please also mention what package where you trying and from where (ubuntu software center, synaptic, command line, etc...). Thanks.

[Robert Roth (evfool)]

In the meantime, you could try running synaptic, and checking for broken packages. In bug #693180 the reporter said that he has fixed this by locating the broken package, removing it, the fixing the remaining broken packages. See comment 3 from bug #693180.

[Sebastian Heinlein (glatzor)]

Does the error reappear if you try to install again? This seems to be a very rare race issue.