oBFusCATed, thanks so much. As a test, thinking perhaps one of the other programs that I have loaded had created problems with the libraries, I created a new virtual machine using VirtualBox and set it up with a brand new installation of Ubuntu 17.04. At this point, there were no libwx* libraries in /usr. I then loaded codeblocks and codeblocks-contrib, and opened the sample project that I included above. Once again, wxsmith only loaded part of the widgets, never showed its toolbar, and C:B crashed when I closed it. Don't know if this helps, but one more data point ...