hi mr novin.it has been strange happening when i was using close surface.i checked places and i found 2 or 3 empty spaces near the hook.i couldn't do anything.i wonder if you help me!
also at the end of the work i wanted to save it for using as a 3d model.i saved it with the( wrl )suffix.but it coudn't work in adobe reader

in addition to these problems,when i was working with sweep program,suddenly i lost window's of sweep program and it didn't come again until now.does it mean ,i have to inistal catia again?