To see if the 2GB limit of the operating system causes the problem, then check for mem usage of the process RobotStudio.exe in the Task Manager. (32-bit Windows can only address up to 2 GB per application.) If the memory usage reaches the 2GB limit, then the CAD model needs to be reduced in size. If the problem appears before reaching the limit, then there might be something else in the CAD model that causes the problem.