Cec, I couldn't reproduce the 3D error during furniture wizard. I already saw it happen rarely, but I could force the error myself during the past days. I even tried to press <enter> to continue very quickly between each step, but even this behavior didn't cause problems. Does it happen each time in your case?

I also successfully tested the copy/paste between projects. I suspect you tried to copy something from Sweet Home 3D 5.7 then paste it in a new project running with Sweet Home 3D 6.0 Beta, in which case it can't work. Copy/Paste works only within the same Sweet Home 3D program.

Hans, I couldn't reproduce your issue too. There must be an additional parameter...