nanoCAD forum

Hi all,
I'm evaluating de nanocad v5 to understand if this would be useful to me in the office. A lot of thing is working ok... not "thaaat fine", but "ok". lol But one thing I didn't get to work: lisp.
I've tested an old flatten lisp. It should rewrite all Z-coordinates to 0, and flatten the entities (lines, polylines and other). But it didn't work correctly. In fact it deleted the polyline! <o>

I'have zero-knowledge of the lisp language. I'm only a user: find a lisp and use it.

Could someone point me what is the matter with this lisp in particular? Or point me to what nanocad v5 "does not" compiles in the lisp language in general?

I searched the forum and the web, and found some (vl-load-com) command. But it doesn't return me nothing in the prompt. Can someone explain what is this "VL-stuff" ?

running nanocad v5, as demo mode, as long the ti-guy is not available. but it has happend at home, running a normal nanocad v5 registered. Windows 10.
*edit title

ops, here is the lsp file