Hello. I'm really new at all this and I have trouble with some of the basics. I want to simulate an office building but I cant seem to figure out the correct way to save my progress, which is causing a lot of frustration... I'm using SU2014 with OS1.5. What I do is: 1) Create some Spaces, Thermal Zones and Geometry 2) Selecting Save As or Export from the OpenStudio menu doesnt seem to do anything so I start with Save As .skp model from the File menu 3) I am then able to use all options under OpenStudio menu (Save As, Export as both .idf and .osm) When I reopen SketchUp, I can't open any of the files I previously saved! The .skp file is blank, and both .idf and .osm files give me error messages (some message about EP vesrions and a Validity check: Failed to load file ... for the .osm file) I'm pretty sure I'm missing something really simple here, any help please?