Sure! The title would be: How to Load Lisp File in AutoCAD LT 2019?

Understanding LISP Files in AutoCAD 2025

AutoLISP is a specialized programming language designed to enhance the AutoCAD environment, allowing users to automate tasks and customize functionalities. However, it’s essential to note that AutoCAD LT does not support AutoLISP, which poses a limitation for users who wish to utilize this powerful tool in their drafting work.

Limitations of AutoCAD LT Regarding LISP

AutoCAD LT is tailored for 2D drafting and lacks many advanced features, including the ability to run LISP routines. Unlike its full counterpart, AutoCAD LT does not have commands like APPLOAD, which are essential for loading external LISP files. Users seeking to utilize LISP scripts will find that AutoCAD LT isn’t configured for such enhancements.

Steps to Load a LISP File in AutoCAD 2025

For users working with AutoCAD that supports LISP files, here’s a comprehensive guide on how to load and execute a LISP file:

1. Download and Rename the LISP File

   • Locate the desired LISP file online. Right-click on the link and select "Save link as" to download it to your local computer.
   • Ensure the file has the correct extension by renaming it to have a .lsp suffix, if it isn’t already.

2. Open AutoCAD 2025

   • Launch the AutoCAD 2025 application on your computer.

3. Initiate the APPLOAD Command

   • In the command line interface of AutoCAD, type APPLOAD and press Enter. This will open the Load Application dialog box.

4. Load the LISP File

   • In the dialog box, navigate to where you saved the LISP file. Select the file and click the "Load" button.
   • Once loaded, you should see a confirmation message indicating that the file has been successfully added.

5. Execute the LISP Routine

   • To run the LISP routine, you may need to enter the specific command defined in the script at the command line. Check the LISP file documentation for the correct command, and type it in to execute.
6. Close the APPLOAD Window
   • After loading and executing the desired commands, click the "Close" button to exit the Load Application dialog.

Creating a LISP File for AutoCAD

For those who are interested in writing their own LISP routines, follow these steps:

1. Open the CUI Dialog Box

   • Type CUI in the command line, and press Enter. This opens the Customize User Interface dialog.
2. Load Your LISP File
   • In the CUI dialog, look for the "LISP Files" category within "Customization".
   • Right-click on this category and select “Load Lisp” from the context menu.
   • Navigate to your LISP file location and select it to add it to the List.

File Support and Location

Specifically for managing your files, you can find AutoLISP files typically stored within the installation directory of AutoCAD. For most users, this will be found under:

C:\Program Files\Autodesk\AutoCAD 2025\Support

FAQ

1. Why can’t I load LISP files in AutoCAD LT?
AutoCAD LT does not support AutoLISP or the APPLOAD command, which is necessary for loading and executing LISP routines.

2. What file extension is used for LISP files?
LISP source files are generally saved with a .lsp extension, while compiled files use a .fas extension.

3. How do I run a LISP routine after loading it?
After loading a LISP file using the APPLOAD command, you will need to enter the command defined within the LISP file at the command line to execute the routine. Check the documentation for the specific command details.