when I import or copy element, element becoming invisible. but when I move it or choose to subdivide its element appear. BUT element visible only when I moving arrow or in subdividing window.
I have try importing the models with 'Ignore hidden 3D objects' and 'Ignore wireframe 3D objects' unchecked
Please check that the model is loaded from the 3D objects tab on the left. The check boxes next to the model have to be checked.
If the model is loaded and you are still having this issue, then it may be due to objects that are so far away from the model causing camera clipping issues (reference points, equipment from a different coordinate system, etc.).
To fix this please either remove these models from the source file, or move them closer to the bulk of the model in Synchro.