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I'm having the same problem.<div>Every time I close Sketchup, all my saves ( and I have many because this error occurs alot) are corrupted....</div><div>I have to start all over again every time, please help!</div><div><br></div><div>this is the error message when I open a saved file:</div><div><br></div><div><div>undefined method `entity' for nil:NilClassError Loading File Trnsys3d.rb</div><div>undefined method `entity' for nil:NilClass</div></div> </div></body>
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