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Long time I'm nothing written in Lisp. So, I hoppe it will serve you. Also, you can saw a short video how it works. The code: (prompt "\nTo run a LISP type: yval") (princ) (defun c:yval ( / old_osmode pline spt ept spt_pline ept_pline datum_line yval_datum_line yval_start_pline yval_end_pline txt_position ang_spt_pline ang_ept_pline datum_value intersecting_lines len i int_pt_pline int_pt_datum_line dist yval_position ang) (setq old_osmode (getvar 'osmode)) (setq pline (car (entsel "\nSelect Polyline to get an Elevation:"))) (while (or (equal pline nil) (not (equal "LWPOLYLINE" (cdr (assoc 0 (entget pline)))))) (prompt "\nSelected entity must be LWPOLYLINE. Try again...\n") (setq pline (car (entsel "\nSelect Polyline to get an Elevation:"))) ) (setq spt_pline (vlax-curve-getStartPoint pline) ept_pline (vlax-curve-getEndPoint pline) ) (if (> (car spt_pline) (car ept_pline)) (progn (command-s "_reverse" pline "") (setq spt_pline (vlax-curve-getStartPoint pline) ept_pline (vlax-curve-getEndPoint pline) ) ) ) (setq datum_line (car (entsel "\nSelect Datum Line:"))) (while (or (equal datum_line nil) (not (equal "LINE" (cdr (assoc 0 (entget datum_line)))))) (prompt "\nSelected entity must be LINE. Try again...\n") (setq datum_line (car (entsel "\nSelect Datum Line:\n"))) ) (setq yval_datum_line (cadr (vlax-curve-getStartPoint datum_line)) yval_start_pline (- (cadr spt_pline) yval_datum_line) yval_end_pline (- (cadr ept_pline) yval_datum_line) ) (setq txt_position (getpoint "\nPick the lower-left corner of the box for elevation value:\n")) (setvar 'osmode 0) (setq datum_value (car (entsel "\nSelect Datum value:"))) (if (equal "MTEXT" (cdr (assoc 0 (entget datum_value)))) (setq datum_value (LM:UnFormat (cdr (assoc 1 (entget datum_value))) T)) (setq datum_value (cdr (assoc 1 (entget datum_value)))) ) (setq ang_spt_pline (angle (setq yval_position_one (list (car spt_pline) (+ (cadr txt_position) 0.1) (caddr txt_position))) spt_pline) ang_ept_pline (angle (setq yval_position_two (list (car ept_pline) (+ (cadr txt_position) 0.1) (caddr txt_position))) ept_pline) ) (entmake (list (cons 0 "TEXT") (cons 100 "AcDbEntity") (cons 100 "AcDbText") (cons 1 (rtos (+ yval_start_pline (atof datum_value)) 2 3)) (cons 10 yval_position_one) (cons 11 yval_position_one) (cons 40 0.35) (cons 72 0) (cons 73 2) (cons 50 ang_spt_pline))) (entmake (list (cons 0 "TEXT") (cons 100 "AcDbEntity") (cons 100 "AcDbText") (cons 1 (rtos (+ yval_end_pline (atof datum_value)) 2 3)) (cons 10 yval_position_two) (cons 11 yval_position_two) (cons 40 0.35) (cons 72 0) (cons 73 2) (cons 50 ang_ept_pline))) (princ "\nSelect intersecting lines:") (setq intersecting_lines (ssget (list (cons 0 "LINE") (cons 8 "DATUM-GRID"))) len (sslength intersecting_lines) i 0 ) (while (< i len) (setq int_pt_pline (vlax-safearray->list (vlax-variant-value (vla-IntersectWith (vlax-ename->vla-object pline) (vlax-ename->vla-object (ssname intersecting_lines i)) acExtendNone))) int_pt_datum_line (vlax-safearray->list (vlax-variant-value (vla-IntersectWith (vlax-ename->vla-object datum_line) (vlax-ename->vla-object (ssname intersecting_lines i)) acExtendNone))) dist (distance int_pt_pline int_pt_datum_line) yval_position (list (car int_pt_pline) (+ (cadr txt_position) 0.1) (caddr txt_position)) ang (angle yval_position int_pt_pline) i (1+ i) ) (entmake (list (cons 0 "TEXT") (cons 100 "AcDbEntity") (cons 100 "AcDbText") (cons 1 (rtos (+ dist (atof datum_value)) 2 3)) (cons 10 yval_position) (cons 11 yval_position) (cons 40 0.35) (cons 72 0) (cons 73 2) (cons 50 ang_spt_pline))) ) (setvar 'osmode old_osmode) (prompt "\nAn elevation values were added!") (princ) ) ;;-------------------=={ UnFormat String }==------------------;; ;; ;; ;; Returns a string with all MText formatting codes removed. ;; ;;------------------------------------------------------------;; ;; Author: Lee Mac, Copyright © 2011 - www.lee-mac.com ;; ;;------------------------------------------------------------;; ;; Arguments: ;; ;; str - String to Process ;; ;; mtx - MText Flag (T if string is for use in MText) ;; ;;------------------------------------------------------------;; ;; Returns: String with formatting codes removed ;; ;;------------------------------------------------------------;; (defun LM:UnFormat ( str mtx / _replace rx ) (vl-load-com) (defun _replace ( new old str ) (vlax-put-property rx 'pattern old) (vlax-invoke rx 'replace str new) ) (if (setq rx (vlax-get-or-create-object "VBScript.RegExp")) (progn (setq str (vl-catch-all-apply (function (lambda ( ) (vlax-put-property rx 'global actrue) (vlax-put-property rx 'multiline actrue) (vlax-put-property rx 'ignorecase acfalse) (foreach pair '( ("\032" . "\\\\\\\\") (" " . "\\\\P|\\n|\\t") ("$1" . "\\\\(\\\\[ACcFfHLlOopQTW])|\\\\[ACcFfHLlOopQTW][^\\\\;]*;|\\\\[ACcFfHLlOopQTW]") ("$1$2/$3" . "([^\\\\])\\\\S([^;]*)[/#\\^]([^;]*);") ("$1$2" . "\\\\(\\\\S)|[\\\\](})|}") ("$1" . "[\\\\]({)|{") ) (setq str (_replace (car pair) (cdr pair) str)) ) (if mtx (_replace "\\\\" "\032" (_replace "\\$1$2$3" "(\\\\[ACcFfHLlOoPpQSTW])|({)|(})" str)) (_replace "\\" "\032" str) ) ) ) ) ) (vlax-release-object rx) (if (null (vl-catch-all-error-p str)) str ) ) ) ) The short video: YVAL.mp4 Best regards.

Another By @Lee Mac Area.lsp look on his web site. https://www.lee-mac.com/arealabel.html

Have you defined the variables 'myfilepath' and 'myfilename' somewhere? If not, these symbols will evaluate to nil, yielding the error you have described.

Here are two good options from Lee Mac

That LISP the is not original AFAIK. It is a couple of functions, you need to call for it with a LISP to make the settings, etc. Several places to get the correct QlSet.lsp and example LISPs to use it. Qleader lisp routine - AutoLISP, Visual LISP & DCL - AutoCAD Forums Qleader System Variables - AutoLISP, Visual LISP & DCL - AutoCAD Forums qleader lisp - AutoLISP, Visual LISP & DCL - AutoCAD Forums assigning q-leader settings using lisp

Look for Notepad your Acad.pgp make code even shorter. This the bat file I use. d: cd\alan\lisp findstr %1 *.lsp