Programming error in aptdaemon when install/remove in USC

[Demonboy]

Binary package hint: aptdaemon

Ubuntu 10.10
usb-modeswitch 1.1.4-1
aptdaemon
Ubuntu Software Centre
/usr/bin/software-center

Attempted to install the Option Globetrotter Add-on to the usb-modeswitch app. The install hung so Ubuntu Software Centre was closed, computer rebooted and USC opened up. It claimed that the add-on had been installed (as does Synaptic). Then attempted to install the other add-on (PPP) and received this error message:

An unhandled error occured

There seems to be a programming error in aptdaemon, the software that allows you to install/remove software and to perform other package management related tasks. Please report this error at http://launchpad.net/aptdaemon/+filebug and retry.

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 comgt package. This might mean you need to manually fix this package.

[Marcos Jaramillo Gil (marcosjllo)]

i have the same problem