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1.1.2 Secondary Packages

The MechanicalSystems secondary packages Dynamics2D/3D, Graphics2D/3D, and Utilities2D/3D need not be loaded explicitly. They are loaded automatically if any of the function definitions they contain are needed. However, if the Information or Definition functions are to work correctly with the functions in the secondary packages, these packages must be loaded into Mathematica. Note that requesting information about a MechanicalSystems function with ?functioname will not cause the associated packages to be autoloaded.

This causes all of the Modeler2D packages to be loaded, including Modeler2D itself.