Software center won't open since a loss of power [duplicate]

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http://askubuntu.com – This question already has an answer here: How do I fix a “Problem with MergeList” or “status file could not be parsed” error when trying to do an update? 6 answers After a power loss on my laptop Acer 2920 Ubuntu 12.10 the software centre will not open I also have an error symbol on the top bar right hand side. Clicking on this symbol gives the following (HowTos)