I work with datasmith and archicad and imported my building via direct link. Also i imported the urban map out of twinmotion.
There were a lot of minor bugs before this so i already tried a lot of things.
I wanted to put down city street lights and everytime i placed them the vanished. then i tried to copy these what helped but then i couldnt move them. So i tried to find where the street lights are that i imported first, when i tried that everythging vanished. I clicked on isolte and on zoom on object. But then everything else was gone i first tried to zoom on my buidling or the urban 3d model unsuccsesful. Then i tried to isole any object and so on didnt work. Also i had some camera perspectives which had my objects in the preview, but when i opened these images everything was empty. I dont know what and how that happened hopefully someone can help me.