The TLEN.lsp script is a widely used, free AutoLISP utility designed to calculate the total length of selected objects in AutoCAD, a feature not available natively. It works by loading the file with the APPLOAD command, after which typing "TLEN" allows users to select lines and arcs to get an aggregate measurement. Free versions and community discussions regarding the script are available via the Autodesk Community forums and GitHub gists.
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To ensure TlenLSP loads every time you open AutoCAD: The TLEN
If you cannot get TLEN to work or want more features, consider these alternatives. Title: Analysis of the "TlenLSP" Malware Targeting AutoCAD
Loading the Script: Once you have the .lsp file, open AutoCAD and use the APPLOAD command. Browse to your file, select it, and click "Load".
Source Code: You can copy the raw code from repositories like GitHub Gist or download it from dedicated CAD utility sites such as CAD KITS.
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