William Biggs wrote: > I have a app that needs this file libQtXml.so.4 Where can I find it For Kubuntu 10.04 that would be in package "libqt4-xml" but probably you are using another Ubuntu version. Then install the package "apt-file" and search with the command sudo apt-file update apt-file search libQtXml.so.4 in a terminal. Nils