How to Load Lisp File in AutoCAD LT 2018?

Understanding LISP Files in AutoCAD LT 2018

LISP (LISt Processing) files are a crucial component for automation in AutoCAD. However, loading LISP files in AutoCAD LT can be challenging due to limitations in the software compared to the full version.

Steps to Load a LISP File in AutoCAD LT 2018

1. Open the Application Load Command
   To initiate the loading process, begin by running the APPLOAD command from the command line. This command handles the loading of application files, including LISP routines.

2. Access the Startup Suite
   In the dialog box that appears upon executing the command, look for the “Startup Suite” section. Here, you’ll find an option labeled “Contents.” Click on this button to view the list of currently loaded programs.

3. Add a New LISP File
   To include a new LISP file, locate and click the “Add” button within the Startup Suite window. This action will allow you to browse your computer’s directories for the desired LISP file.

4. Select the LISP File
   Navigate through your file system to find the LISP file you wish to add. Once located, select the file and click “Open” to confirm your choice.

5. Finalizing the Load Process
   After you have added the LISP files to the Startup Suite, ensure all selections are made correctly, then click the “Close” button to exit the window. The newly added LISP routine should now be loaded into your AutoCAD LT environment.

Important Considerations

• Limitations of AutoCAD LT
  Unlike the full version of AutoCAD, AutoCAD LT does not support AutoLISP. The APPLOAD command is usable for certain applications but has limited functionality concerning LISP scripts.

• File Location for LISP Files
  Use standard file paths to locate AutoCAD support files, including LISP routines. Typically, these files are found in the installation directories such as C:\Program Files\Autodesk\AutoCAD 2025\Support.

FAQ

Can I use LISP routines in AutoCAD LT?
No, AutoCAD LT does not support AutoLISP or the APPLOAD command for loading LISP files.

What are the primary differences between AutoCAD and AutoCAD LT?
AutoCAD offers both 2D and 3D drafting, along with automation capabilities, whereas AutoCAD LT is strictly focused on 2D drafting, making it less versatile but also more affordable.

How can I create a LISP file?
To create a LISP file, you can use a text editor to write your LISP code and save the file with a .lsp extension. After that, use the CUI command in the command line to manage and load your LISP routines in AutoCAD.