qAPT: no way to install .deb

i hope this is the right forum for that issue.

My Netrunner does not allow me to isntall any .deb. When i try to open it with qAPT it just claims an error like

"The Package could not be installed. Your setup could be incomplete/wrong"

(not sure how to translate it exactly from german :s )

So i had a look in different german forums about that issue and found out that it’s often related with muon. Since im not using Muon i was like dont know what to do nex.
Eventually i found out that working on some systems, so i tried it on mine with no effect:

sudo rm -f /var/lib/apt/lists/* 

Updating via apt-get works normally.

So, do you have any suggestions so far?

Thanks for your patience and help,


You can always use the command line command like so

sudo dpkg -i /path/to/the_deb_file_you_want_to_install.deb.

I wonder if qapt shows any more error messages when starting it via command line and trying to install the deb.

Thanks @leszek
That actually works, so i wonder where is the problem…