corrupt OpenStudio model

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There is a related thread. It is not about once this happens. A few tips to avoid issue.

1. Don't use undo
2. Don't explode spaces or make a SketchUp group or component combining multiple spaces.
3. Don't save the SketchUp file unless you need to. Opening the OSM directly is more reliable.
4. Use SaveAs frequently so you have many OSM files you can roll back to.

Here is a link with tips once you suspect a probelm in a model

help-regarding-rendering-and-white-surfaces

When working on a model with the OpenStudio plugin in Sketchup, the model data exist in OpenStudio with the portions being displayed existing in Sketchup as well. Problems can occur if the data in the two programs get out of sync. When a new surface or subsurface is created in Sketchup, OpenStudio makes default assignments to the surface such as the construction type. Since several steps were taken all at once, the undo function is not able revert the model multiple steps to remove the newly created surface. The Sketchup representation will look fine, but no longer matches the underlying OpenStudio data. It is recommended that you never use “Undo” when working on an OpenStudio model in Sketchup.

In addition, the model should always be saved and opened with the OpenStudio plugin by going to the menu Plugins->OpenStudio->File or by using the Open and Save buttons in the OpenStudio toolbar. All model files should end in .osm not .skp. Do not use Sketchup file menu commands when working with OpenStudio Models.