The following line of lisp code should return point p1 only if an
intersection
is found. If no intersection is found, it will return
NIL.

(setq
p1 (osnap (getpoint "'Pick intersection: ") "int"))

It works
perfectly in 2009i, but crashes in 2010.

If the safety feature is
omitted, namely:

(setq p1 (getpoint "'Pick point: ") )

it
works in 2010, but it will now snap onto anything, even a void.

hi,setq,

your id is very interesting, is it a assignment function ?
to be frankly ,i know a little about programme ,but i just know little about lisp .
i tried (setq p1 (osnap (getpoint "'Pick intersection: ") "int")) in zwcad 2010 (_VERNUM = "2010.04.30(14725)") ,it works well ,returns the coordinates of the intersection i osnap. If no intersection is found, it will return NIL.
BTW,zwcad2010((_VERNUM = "2010.04.30(14725)")) will be released in MAY.
if the problem still exist , would you please kindly send your the problem to tech@zwcad.com via email and tell me the vernum of zwcad you are using . It is better to make a movie to record the operations you have done before the problem occured. In this case, we could verify the problem easily. After receiving your email, we will try to find a solution for the problem as soon as possible. Thanks in advance.

have a nice day and wish to learn more from you ~~