The first time you need to register the plugin with rhino. Find the .rhp file that was compiled and drag it onto the rhino program window. Then rhino knows where to find your plugin, and you should be able to run you test command. If you close rhino normally, the locating of the plugin is saved in the Windows registry, and rhino will find your plugin automatically the next time.
Thanks for your reply. I did register the plugin with rhino by doing what you suggest, but before I was going through
Tools > Options > Plug-ins
and then installing the plugins. In fact in
Help > Plug-ins > Test
does appear but I get the same error message as before:
Rhino debugging error dialogs enabled. Use the “TestErrorCheck” command to adjust settings.
I do not really understand why this is happening. Any help would be much appreciated.