https://forums.autodesk.com/t5/autocad-forum/help-modifying-this-lisp/m-p/5621294#M331514 <BLOCKQUOTE><HR /><a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/69526">@Kent1Cooper</a> wrote:<BR /> <BLOCKQUOTE>....</BLOCKQUOTE> <P>Are your contours <STRONG><EM>drawn at their actual elevation</EM></STRONG> in 3D?&nbsp; If so, try&nbsp;<A href="https://forums.autodesk.com/t5/visual-lisp-autolisp-and-general/need-lisp-routine-to-label-splined-pline-contour-lines/m-p/4979644#M321957" target="_self">this modification</A> of the routine in the earlier link.&nbsp; The <STRONG>LEM</STRONG> command in <STRONG>L</STRONG>abel<STRONG>E</STRONG>lev<STRONG>M</STRONG>ask.lsp&nbsp;....</P> <HR /></BLOCKQUOTE> <P>So I looked through that, and found it was still using (command) for Undo End in the error handler, which is a no-no in Acad2015+.&nbsp; Here's an updated version [with a few other little tweaks] that should be good in any version.</P> Tue, 05 May 2015 13:57:42 GMT Kent1Cooper 2015-05-05T13:57:42Z