Set Origin to geometry not available I am reading a book called: Blender Game Engine Beginner Guide by Victor Kuller Bacone, from Packt publishing, in which there is an exercise which directs to download from the 3D Warehouse a boat in sketchup format. The next instruction is to export the boat to Collada format, and import it into Blender. In blender, the user is instructed to use Tools > Edit > Set Origin and choose Center of Mass. When I follow those instructions, the boat object is centered. But when I try the next series of steps, downloading a killer whale (orca whale) from the same website into  Sketchup, exporting it to Collada, and import it into Blender, I don't see the menu option Tools > Edit > Set Origin. The keyboard shortcut CtrlShiftAltC doesn't seem to work either. Why can't the option for setting the origin to the center of mass work after importing the Orca?

I am using Sketchup version Make 2014 14.0.4900. Whether I choose from sketchup the "fix it" or "fix it later" options on exporting, I get the same error.
The screenshot shows an object origin at the center of the mesh, with a dotted line to the Orca. If I add an empty to the default scene, and define that empty as a parent of the default cube, I get a dotted line from the empty to the cube much like the line shown in the screenshot. If I select the empty object, the "Set origin" button disappears from the tool shelf. This suggests to me that you don't have the Orca selected, but instead have selected the empty.