Hello everyone, When opening a file made with the plug-n of trnsys3d a receive the following message and I lose all the windows I have designed. Any suggestions? The error message is the following: ERROR: NoMethodError undefined method `points' for nil:NilClass BACKTRACE: C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/interfaces/Surface.rb:200:in `update_entity' C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/interfaces/DrawingInterface.rb:84:in `draw_entity' C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/interfaces/ModelInterface.rb:205:in `update_model' C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/interfaces/ModelInterface.rb:201:in `each_with_index' C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/interfaces/ModelInterface.rb:201:in `each' C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/interfaces/ModelInterface.rb:201:in `each_with_index' C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/interfaces/ModelInterface.rb:201:in `update_model' C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/interfaces/ModelInterface.rb:118:in `draw_model' C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/ModelManager.rb:183:in `open_input_file' C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/CommandManager.rb:71:in `open_input_file' C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/MenuManager.rb:83:in `create_commands' C:/Program Files (x86)/Google/Google SketchUp 7/Plugins/Trnsys3d/lib/MenuManager.rb:83:in `call' Thank you in advance Sotiris |