Autocad Tlen.lsp Download May 2026

✅ Safe to download and use, provided source is trusted.

(defun C:TLEN (/ ss tl n ent obj) (setq ss (ssget '((0 . "LINE,*POLYLINE,ARC,CIRCLE,ELLIPSE,SPLINE"))) tl 0 n 0) (if ss (repeat (sslength ss) (setq ent (ssname ss n) obj (vlax-ename->vla-object ent) tl (+ tl (vlax-get obj 'Length)) n (1+ n)) ) (princ "\nNo valid objects selected.") ) (princ (strcat "\nTotal length: " (rtos tl))) (princ) ) Save as mytlen.lsp and load. This avoids any external download. | Aspect | Detail | |--------|--------| | Virus risk | Extremely low for .lsp from trusted authors, but always review code if paranoid. | | Units | TLEN returns drawing units – check UNITS setting before use. | | Dynamic blocks | May fail unless exploded – not supported in basic TLEN. | | 3D polylines | Returns 3D length (not projected 2D length). | 8. Conclusion Downloading tlen.lsp from a reputable source like Lee Mac is safe, legal, and highly recommended for any AutoCAD user needing rapid total length calculations. The routine is lightweight, works across most AutoCAD versions (2000–2025), and significantly reduces manual summation errors. For IT-restricted environments, the self-authored 10-line version provides identical core functionality without external dependencies. autocad tlen.lsp download

(autoload "tlen" '("tlen")) | Step | Action | |------|--------| | 1 | Load tlen.lsp (if not auto-loaded) | | 2 | Type TLEN → Enter | | 3 | Select objects (window, crossing, or individual) | | 4 | Press Enter | | 5 | Read total length from command line | ✅ Safe to download and use, provided source is trusted