Use the following procedure to import a model as a module within your model.
Note: You can also create a module directly, by building it within a model. For more information, see Creating modules.
tool on the Map or Model toolbar and
then clicking the diagram surface to place the module entity on the layer.On the Model layer, select the module icon.
The Module Properties panel opens.
The Open File dialog box opens.
in the lower-right corner of the panel.You can now navigate into the module by double-clicking the module icon.