[How to hollow out a 3d Mesh object. I am trying to make a "shell" of an organic shaped object prior to CAM]

It is a mesh so I don't believe it is truly a solid.  I tried to convert it to a generic solid and it crashed Vectorworks. 

[How to hollow out a 3d Mesh object. I am trying to make a "shell" of an organic shaped object prior to CAM]

I am going to fabricate a "flat packed" or sliced model of some animals using a CNC router.  I first want to hollow out the inside of the model prior to slicing it in Slicer for Fusion 3d.  This will reduce the weight of the final model.   For example I have a .stl file of this dolphin that I am then slicing and exporting the sliced files as .dxf files.  I could offset the 2D lines in the .dxf file prior to machining, but the part numbers and dowel placement would not be optimized. 

 

Any help would be greatly appreciated. 

[Reports - calculating the number of various symbols in a drawing]

Thank you unearthed, 

I don't have Reports in my Tools pull down menu.   I do have Spotlight>Reports>CreateReport and these selections did the trick. 

[Reports - calculating the number of various symbols in a drawing]

How can I generate a list of the various symbols I have in a drawing? 

[Object with multiple classes]

Thank you michaelk.  Very well explained.  

[Object with multiple classes]

I am running into a problem where I have some simple objects that have multiple classes associated with them.  ie. more than one class must be set to visible to see the object, yet the Object Info window only shows one of the classes that is associated with the object.   Is there a way to dissociate one of the classes?