Hi Josh,   I actually deleted both versions of wx manually (technically I moved them to a temp folder so that the system would not find them).   Now, I just tried "sudo apt-get install --reinstall libwxgtk2.8-dev", and it worked fine, but it still seems like RVIZ does not see it. I can no longer run or compile RVIZ. Here's the log output of "rosmake rviz":     [  0%] Built target rospack_genmsg_libexe [  0%] Built target rosbuild_precompile Scanning dependencies of target rviz [  1%] Building CXX object src/rviz/CMakeFiles/rviz.dir/plugin/plugin.o [  2%] Building CXX object src/rviz/CMakeFiles/rviz.dir/plugin/plugin_manager.o [  3%] Building CXX object src/rviz/CMakeFiles/rviz.dir/plugin/type_registry.o ... [ 53%] Building CXX object src/rviz/CMakeFiles/rviz.dir/robot/robot.o [ 54%] Building CXX object src/rviz/CMakeFiles/rviz.dir/selection/selection_manager.o [ 55%] Building CXX object src/rviz/CMakeFiles/rviz.dir/generated/rviz_generated.o Linking CXX shared library ../../lib/librviz.so [ 55%] Built target rviz Scanning dependencies of target executable [ 57%] Building CXX object src/rviz/CMakeFiles/executable.dir/visualizer_app.o Linking CXX executable ../../bin/rviz /usr/bin/ld: warning: libwx_gtk2u_richtext-2.8.so.0, needed by /opt/ros/cturtle/stacks/visualization_common/ogre_tools/lib/libogre_tools.so, not found (try using -rpath or -rpath-link) /usr/bin/ld: warning: libwx_gtk2u_aui-2.8.so.0, needed by /opt/ros/cturtle/stacks/visualization_common/ogre_tools/lib/libogre_tools.so, not found (try using -rpath or -rpath-link) /usr/bin/ld: warning: libwx_gtk2u_xrc-2.8.so.0, needed by /opt/ros/cturtle/stacks/visualization_common/ogre_tools/lib/libogre_tools.so, not found (try using -rpath or -rpath-link) /usr/bin/ld: warning: libwx_gtk2u_qa-2.8.so.0, needed by /opt/ros/cturtle/stacks/visualization_common/ogre_tools/lib/libogre_tools.so, not found (try using -rpath or -rpath-link) /usr/bin/ld: warning: libwx_gtk2u_html-2.8.so.0, needed by /opt/ros/cturtle/stacks/visualization_common/ogre_tools/lib/libogre_tools.so, not found (try using -rpath or -rpath-link) /usr/bin/ld: warning: libwx_gtk2u_adv-2.8.so.0, needed by /opt/ros/cturtle/stacks/visualization_common/ogre_tools/lib/libogre_tools.so, not found (try using -rpath or -rpath-link) /usr/bin/ld: warning: libwx_gtk2u_core-2.8.so.0, needed by /opt/ros/cturtle/stacks/visualization_common/ogre_tools/lib/libogre_tools.so, not found (try using -rpath or -rpath-link) /usr/bin/ld: warning: libwx_baseu_xml-2.8.so.0, needed by /opt/ros/cturtle/stacks/visualization_common/ogre_tools/lib/libogre_tools.so, not found (try using -rpath or -rpath-link) /usr/bin/ld: warning: libwx_baseu_net-2.8.so.0, needed by /opt/ros/cturtle/stacks/visualization_common/ogre_tools/lib/libogre_tools.so, not found (try using -rpath or -rpath-link) /usr/bin/ld: warning: libwx_baseu-2.8.so.0, needed by /opt/ros/cturtle/stacks/visualization_common/ogre_tools/lib/libogre_tools.so, not found (try using -rpath or -rpath-link) /opt/ros/cturtle/stacks/visualization/wxpropgrid/propgrid_install/lib/libwxcode_gtk2u_propgrid-2.8.so: undefined reference to `wxListBase::Find(wxListKey const&) const@WXU_2.8' /opt/ros/cturtle/stacks/visualization/wxpropgrid/propgrid_install/lib/libwxcode_gtk2u_propgrid-2.8.so: undefined reference to `wxBaseArrayInt::Index(int, bool) const@WXU_2.8' /opt/ros/cturtle/stacks/visualization/wxpropgrid/propgrid_install/lib/libwxcode_gtk2u_propgrid-2.8.so: undefined reference to `wxScrollHelper::DoPrepareDC(wxDC&)@WXU_2.8' ... [hundreds of lines here] /opt/ros/cturtle/stacks/visualization/wxpropgrid/propgrid_install/lib/libwxcode_gtk2u_propgrid-2.8.so: undefined reference to `wxOwnerDrawnComboBox::GetEventHashTable() const@WXU_2.8' /opt/ros/cturtle/stacks/visualization/wxpropgrid/propgrid_install/lib/libwxcode_gtk2u_propgrid-2.8.so: undefined reference to `wxButton::SetDefault()@WXU_2.8' /opt/ros/cturtle/stacks/visualization/wxpropgrid/propgrid_install/lib/libwxcode_gtk2u_propgrid-2.8.so: undefined reference to `wxScrollHelper::GetViewStart(int*, int*) const@WXU_2.8' collect2: ld returned 1 exit status make[2]: *** [bin/rviz] Error 1 make[1]: *** [src/rviz/CMakeFiles/executable.dir/all] Error 2 make: *** [all] Error 2    Any idea why this keeps happening? Is there a way to remove all of these libraries and let ROS re-install only what it requires? Is there a better solution?   Benoit   On July 13, 2010 at 8:39 PM Josh Faust wrote: > Did you delete the one in /usr, or use apt to uninstall it?  If you manually > deleted it, you'll have to force a reinstallation (sudo apt-get install > --reinstall libwxgtk2.8-dev) > > Josh > > On Tue, Jul 13, 2010 at 5:50 AM, Benoit Larochelle < > Benoit.Larochelle@dfki.de> wrote: > > >  I think that one of the problems is that I seem to have two versions of > > wx, one in /usr and one in /usr/local, like Josh suggested. > > > > I manually deleted both versions of wx and I tried to reinstall it with > > rosdep, but it found nothing. It just told me that there were no missing > > components, but yet when I try to compile RVIZ, it complains because it > > can't find the wx libraries. I tried re-installing wx from scratch, but > > the compiler still cannot find the libraries. > > > > By the way, I'm running Ubuntu 9.10. > > > > Benoit > >