Tim, I think this type of question might be a better asked at http://answers.ros.org/questions/ in the future, but I would think that perhaps you lost rviz in the transition from Diamondback to Electric due to changes in the variant definitions?
I'm running Ubuntu 11.04 on a Lenovo T520 laptop and last used rviz
about two weeks ago. After some initial confusion and troubleshooting I
compared my install to another machine and found that the visualization
package under ros electric install was missing.
I have noticed a few ros electric updates listed during the Ubuntu
Update manager runs, but I don't expect it to remove packages
completely.
Any idea how this could happen?
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