Envelope disappears when opening sketchup

I get this message when I open up Sketchup. My colored envelope boxes disappear after I click OK. When I recheck the layers I cant restore it. Help please! image description

Are you sure you are saving your .osm project the right way? This is done by clicking the Save icon icon in the OS toolbar and NOT using File>>Save/Save As in the SketchUp Application. Various toolbars for OS can be made visible using the View>>Toolbars option... Saving the file in the SketchUp application does not save any of your Openstudio features, which I think could be one reason why your envelope is 'disappearing'.