if you see attach file , you can see some line
i would like to use boundary command , but there is faliure becuse of broken lines
that is simple line
if i use complex line , i can't find broken area
so i thought good idea
if i select line , pw line , arc ........... , and that is open lines and arcs . pw lines
i would like to make point object in open area or end line .........
can you understand ?