Hello ! I had just a little problem when i try to install the Library... When i enter this command : " # dpkg -i python-matplotlib-data_1.0.0-1_all.deb " My N9 returning this error : "Aegis rejecting python-matplotlib-data_1.0.0-1_all.deb : Could not open debian archive Aegis aborting dpkg -- all listed package files rejected" Can i clean this error ? What ? Thanks for your help... ^^ Sorry for my approxymatly english .. i'm french ^^