An upgrade from 'lisa' to 'oneiric' is not supported with this tool.

Asked by K Israel on 2012-11-28

I cannot use the Synaptic package manager. in terminal, I get: Unable to get exclusive lock
This usually means that another package management application (like apt-get or aptitude) is already running. Please close that application first.

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marcobra (Marco Braida) (marcobra) said :

Are you using Mint "lisa" ... ?

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Robert (deadflowr) said :

You can only run one instance of apt at a time.
What this means is either your system was updating, or installing packages, or you had another instance running, like apt-get install program.
Normally, if you wait a moment the program will finish and free it up again.
I don't think the mixing of lisa and oneric repos would cause that error.
I would say though that if it remains in a prolong state, file a bug using the ubuntu-bug package name technique in the terminal.
However, since you have the mint repo I don't know if ubuntu-bug would work, since having the mint repo most likely means you're running mint so...

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Warren Hill (warren-hill) said :

I would not recommend upgrading to oneiric: support runs out in April. I would definitely go with precise; assuming you want Ubuntu.

Lisa is not Ubuntu, Mint? Its not surprising you can not update. I would recommend a backup then a clean install of the version you want.

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