Problems with Exporting
Exporting produces an empty VWS file
There are two very common reasons why this may be happening.
First, only geometry that is in SketchUp Groups (or Components) is exported. In other words, your geometry has to be in a Group. Any geometry that is not in a Group will not be exported. It is very common to just draw a cube, click on the "Separate tool" button, then click an "Export tool" button – which means you have forgotten to Group your geometry. A quick way to fix this is to type "ctrl-a", then type "g".
The second problem, which is equally common, is to forget to invoke the Separate Solids and Canopies Tool. Most of the Export Tools only look at geometry that is on specific Layers, and the easiest way to get geometry on those Layers is by using the Separate Tool. Refer to the Separating Geometry section for more information.