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My Ubuntu Software Center is will not launch. I have read several related question and I have tried various suggestions from Ask Ubuntu including this question, but all attempts return the same error messages. I am running Ubuntu 12.04.

sudo apt-get install --reinstall software-center
sudo apt-get update && sudo apt-get upgrade
sudo apt-get install --reinstall python-pkg-resources

All attempts provide the following errors:

Errors were encountered while processing:  

How do I correct these errors and get my system functioning properly?

In response to Lucio's comment:

Running the following two lines of code produced the same errors.

sudo apt-get clean
sudo apt-get update && sudo apt-get upgrade

Continuing with the help file, I ran:

sudo dpkg --configure -a

and received the following errors:

Errors were encountered while processing:

Finally, I ran:

sudo apt-get -f install

but this, again, provided the original errors.

I was installing Python 3.3 to use as the default vice Python2.7. Is any of this (from /usr/bin) creating my problem?

*-rwxr-xr-x  1 root         root             4124 Apr 17  2012 pyclean  
*-rwxr-xr-x  1 root         root            11933 Apr 17  2012 pycompile  
*lrwxrwxrwx  1 root         root                8 Aug 14 18:02 pydoc -> pydoc2.7  
*-rwxr-xr-x  1 root         root               79 Aug  1 01:40 pydoc2.7  
*lrwxrwxrwx  1 root         root               12 Aug 14 18:02 pygettext -> pygettext2.7  
*-rwxr-xr-x  1 root         root            22103 Aug  1 01:40 pygettext2.7  
*-rwxr-xr-x  1 root         root              217 Mar  9  2012 pyhtmlizer  
*lrwxrwxrwx  1 root         root               28 Dec 24 01:51 python -> /usr/bin/Python-3.3.0/python  
*lrwxrwxrwx  1 root         root                9 Aug 14 18:02 python2 -> python2.7  
*-rwxr-xr-x  1 root         root          2989480 Aug  1 01:40 python2.7  
*drwxr-xr-x 16 inigomontoya inigomontoya     4096 Dec 24 01:42 Python-3.3.0  
*-rw-r--r--  1 root         root         16327785 Sep 29 05:15 Python-3.3.0.tgz  
*lrwxrwxrwx  1 root         root               29 Aug 14 18:02 pyversions -> ../share/python/  
share|improve this question
The problem is not the SC, but the mentioned packages. You should enter the first two commands of this answer. Notify the result please. – Lucio Dec 27 '12 at 21:40
I followed the tutorial but the result was the same. I updated my question with more details. – Magellan Dec 28 '12 at 3:34
Please also paste large blocks of code into this official Ubuntu tool and attach it into your question where acceptable. Thanks :) – Mochan Dec 28 '12 at 6:02
@user117091 Run the following commands. sudo rm -r /var/cache/apt/archives and then sudo apt-get clean && sudo apt-get update – Lucio Dec 28 '12 at 18:31
The first line kicked me back to a prompt and when I ran the second line I received the message: E: Could not open lock file /var/cache/apt/archives/lock - open (2: No such file or directory) E: Unable to lock the download directory – Magellan Jan 1 '13 at 18:21

If the version of python is the issue, can you please post the output of sudo update-alternatives --config python? If it shows python 3.3 as the default, change it to python 2.7 and then re-install the software-center, otherwise the version of python does not seem to be the root-cause.

share|improve this answer
The output is: update-alternatives: error: no alternatives for python. – Magellan Jan 1 '13 at 18:23

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