For user-defined nodes only, you must create a workbench Eclipse plug-in as well as the runtime .lil or .jar file. The workbench plug-in adds the user-defined node to the node palette in the Message Flow editor, and allows the new node to be included in message flows. This additional task is described in Creating the user interface representation of a user-defined node in the workbench. This step is not required for user-defined parsers.