Your problems sound like you have an older revision (f.e. R4 or R5) or the wrong service pack. This should be passed since R7.
In addition to "close profile": In my opinion, there isn't such a command. I missed it too in older versions, but till now (V5R8) I never had this problem.
There is no option for an older version, because IBM nor Dassault wanted to cut off V5 from V4. I discussed with them on a german exhibition last year. That's the reason why the complete industrial imigration of V5 should take some further years from now.
Remember: TILL NOW THERE IS NO USEFUL...
"Why is it used?" - think about weight, price, energy absorption, profile manufacturing, EI, bending stiffness, buckling,...
Just calculate some sample profiles and you will see the pros and cons very fast. I made such calculations on our Formula Student race car last year. It take a...
