The 3D Dynamic tab of the Tool Path Visualization dialog is grayed out and not selectable.
Solution
If the 3D Dynamic tab is on the dialog, but grayed out so it's not selectable, it is a licensing issue. Either the required license option is missing, or all seats are in use and one is not available to access at the moment.
3D Dynamic verification calls licensing module, 'ug_visualize.' Verify that the 'ug_visualize' increment is in the license file. And if so, how many seats are available to be shared.
Notes