On the second run, AutoCAD complained differently: the routine loaded, then failed quietly, spitting odd coordinates onto a log file with non‑ASCII characters. Marco watched a string of outbound requests try to reach domains he didn't recognize. The sandbox's fake DNS redirected them to nowhere, but he could see the behavior pattern. He pulled the file into a decompiler and frowned. The code was obfuscated, not the usual harmless quickfix snippets he was used to. Among the encrypted lines he found a stub that read, in clear text, "collect:sysinfo." He closed the decompiler and shut down the VM.
The routine is a widely used AutoLISP script for AutoCAD that calculates the total length of multiple selected objects—such as lines, polylines, arcs, and circles—with a single command. It is a free tool commonly shared across community forums and developer repositories to automate tedious manual measurements. Where to Download tlen.lsp Free autocad tlenlsp download free
: Once loaded, typing the TLEN command into the command line triggers the tool. On the second run, AutoCAD complained differently: the
: Used extensively in fields requiring material takeoffs, such as estimating total piping, cabling, or fencing lengths. Where to Download He pulled the file into a decompiler and frowned
The TotalLength plugin is a free alternative that offers a dialog box and the ability to copy results to your clipboard.
Once you have the .lsp file, follow these steps to load it into AutoCAD: