hyperModel requires GraphViz libraries to layout dynamic class diagrams ("dynagrams"). This is a platform-specific binary and only the Windows version of GraphViz is bundled with hyperModel plug-ins. You must download and install the latest Linux build for your distro from the GraphViz download page.

The GraphViz binary executable, named "dot", must be on the system PATH that is used to run Eclipse. After this is installed and configured, you should be able to display hyperModel class diagrams!