Dear All, According to written in one link the following gbXML element types are imported from gbXML to the OpenStudio Model: -Construction - Material -ScheduleDay -ScheduleWeek -Schedule -Campus - Building -Space -Surface -SubSurface. In my project, I modeled one project and exported in gbXML format without materials and other factors. Since, I thought it is better to assign material in OS .Now after importing gbXML into OS I do not know how I can assign the above elements types such as materiel. Because , my project is huge I wonder how can do them. Yours sincerely,