If you get the above error message it is very likely that you have installed the wrong version of the plug-in for that 3ds max release. Ensure that you have the correct installer for your version of 3dsmax.
Tags: 3ds max, error code, finalToon
Another case for this error may be a false loading order in the plugin.ini file of 3ds max. Make sure the correct loading order is always present in the plugin.ini.