You have the plug-in loaded and the Icon for Fusion comes up on the ribbon. When you select a 3D solid and click on the Fusion Icon, the following error message displays:
_EDITINFUSION Unknown command "EDITINFUSION". Press F1 for help.
Solution
You have to pick on the small triangle below Autodesk Inventor Fusion 2012 which is a part of AutoCAD 2012, this allows you to check a box that tells it to share with Fusion for editing of 3d objects.
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