Question-and-Answer Resource for the Building Energy Modeling Community
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I have also experienced this issue and found the easiest way to avoid this is to never save the sketchup file and always work in OpenStudio or OpenStudio leagcy. Also make sure you are drawing in a zone, you can tell this by making sure you have a dotted line box where you are drawing (this is relevant for legacy but might still be the case in openstudio as well). A white surface is sure sign your model is going to crash at some point and a lot of the work you do after you have seen the surface could be lost. We always save multiple copies regularly so we can go back to an older version if something goes wrong like this. If I see a white surface I save under a different file name, make sure to say I don't want to save any sketchup entities, close the program, then reopen and see what I have lost.
