Windows Security often blocks .lsp files downloaded from the internet.
Autodesk finally added a native total length tool. In newer versions: autocad tlenlsp download work
Place TLEN.LSP in a dedicated folder, e.g.:
C:\CAD\LISPS\ or C:\Users\[YourName]\AppData\Roaming\Autodesk\ApplicationPlugins Windows Security often blocks
If you are reading this because tlenlsp doesn’t work, here are the five most common failures. Method B – Permanent Load (Recommended)
Method A – One-Time Load (Testing)
Method B – Permanent Load (Recommended)
Method C – Drag and Drop (Easiest)