Hi Michael,

Thank you for your reply,

That could be the reason, however, I tried to import another relatively large stp file into MOI (of a size of 37.5 meg) I did not get the same results. But I will check my machine for the dust.
Meanwhile could you check below link? see if it works for you.
https://1drv.ms/u/s!AgF6VFezvIYck2etUzGE19XByQ1n?e=eENE0V

Best,
Psygorn