[TRNSYS-users] Corrupted IDF file in trnsys3d

[gary goddard <tetanus4@gmail.com>]

The problem I am having with Trnsys3d is after I create the SU file and 
IDF file and close it, whenever I reopen it I get a corrupted IDF file 
that creates a zone for every surface and get the error box "Sorry..the 
plugin has encountered an error". This also means I can not simulate the
 temp data in SU.

error info:

ERROR:
NoMethodError
undefined method `entity' for nil:NilClass

BACKTRACE:
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/interfaces/Surface.rb:144:in `create_entity'

C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/interfaces/Surface.rb:143:in `each'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/interfaces/Surface.rb:143:in `create_entity'

C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/interfaces/DrawingInterface.rb:83:in `draw_entity'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/interfaces/ModelInterface.rb:205:in `update_model'

(eval):0:in `each_with_index'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/interfaces/ModelInterface.rb:201:in `each'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/interfaces/ModelInterface.rb:201:in `each_with_index'

C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/interfaces/ModelInterface.rb:201:in `update_model'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/interfaces/ModelInterface.rb:118:in `draw_model'

C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/ModelManager.rb:183:in `open_input_file'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/ModelManager.rb:66:in `attach_input_file'

C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/ModelManager.rb:58:in `start'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/PluginManager.rb:138:in `new_model'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/Trnsys3d/lib/observers/AppObserver.rb:41:in `onOpenModel'

Any help would be appreciated.  Thanks,
-- 
Gary Goddard