Ubuntu software center crashes with "unhandleable bug" when trying to install new packages

[HThompson]

Error details read:

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 768, in simulate
    return self._simulate_helper(trans, status_path)
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 938, 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 libnb-apisupport2-java package. This might mean you need to manually fix this package.

[HThompson (hthompson)]

I was able to run "sudo dpkg --configure -a" and it seems to have fixed the problem. I think the software center got hung-up while I was trying to install the Net Beans IDE and caused the problem.

[Inger (ingerstra)]

I have the same bug but after installing Thunderbird.
Thunderbird is working, but Iḿ not able to install other packages (I was installing Filezilla when the following error occurred):

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 768, in simulate
    return self._simulate_helper(trans, status_path)
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 938, 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 thunderbird-gnome-support package. This might mean you need to manually fix this package.

[HThompson (hthompson)]

Did you try running "sudo dpkg --configure -a" to clean-up your packages? This fixed the problem for me.