Update Manager Not Working

[ron177]

An unusual situation has happened to my computer. There seems to be a bug with the "update-manger" package. When I click on the "Software Up to Date" botton, I get the following error message:


<<Could not initialize the package information
An unresolvable problem occurred while initializing the package information.
Please report this bug against the 'update-manager' package and include the following error message:
'E:Encountered a section with no Package: header, Eroblem with MergeList /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_multive rse_binary-amd64_Packages, E:The package lists or status file could not be parsed or opened.'>>


[see also the attached photo]


Here's also an additional problem:


When I turn on my computer, I have an error sign on my upper screen desktop toolbar (see the second attached photo). When I click on the red error sign, I get the following error message:


<<An error occurred. Please run Package Manger from the right click menu or apt-get in a terminal to see what is wrong.>>


I think these two problems are indeed one. If someone can help me with it, I would greatly appreciate that.


R

[darkapec]

try

sudo apt-get clean all
sudo apt-get update

then try to open package manager again

[darkapec]

if that does not work please post contents of

/etc/apt/sources.list