HI @ahmad.alkalaiHDFUH and welcome to the forum 
many things can go wrong it will depends how your cad is draw…so you probably need some cleanup…but you could take a look at this post hre and see if it could help…
HI @ahmad.alkalaiHDFUH and welcome to the forum many things can go wrong it will depends how your cad is draw…so you probably need some cleanup…but you could take a look at this post hre and see if it could help…