I finished my work, save and closed the programme. But building view and site view disappeared form the drawings when i later open the dialux file. Also some 3D view on 4th floor and 5th floor. Here the files which i'm done. https://drive.google.com/drive/folders/1W4NJL9dMd3lkqRoLDVq0qlyNC7zhesWz?usp=sharing Help me to solve this problem Thanking you..