AutoCAD

How to Load Lisp in AutoCAD LT 2019

Steps to Load a LISP File in AutoCAD LT 2019

Loading a LISP file in AutoCAD LT can be a bit different from the standard AutoCAD. While AutoCAD LT does not fully support AutoLISP functionality, there is a method to integrate your LISP files into the environment, leveraging the CUI (Customize User Interface) editor. Follow these steps for effective loading:

Step 1: Open the CUI Command

Begin by activating the Customize User Interface editor. You can do this by typing CUI into the command line and pressing Enter. This command opens a dialog box that allows for customization of AutoCAD’s user interface.

Step 2: Locate the CUI File

Within the CUI editor, identify the appropriate CUI file to modify. This could be the default file, usually named acad.cuix, or a custom .cuix file if you have personalized your setup in the past.

Step 3: Access LISP Files

In the CUI editor, look for a category labeled “LISP Files.” Right-click on this section. A context menu will appear with various options related to LISP file handling.

Step 4: Load LISP Files

Select the option labeled Load LISP from the right-click context menu. This action will prompt a file browser to appear.

Step 5: Select Your LISP File

Navigate through the file browser to find the desired LISP file you wish to incorporate. Once you find it, select the file and click Open. This seamlessly adds the LISP file to the list within the CUI editor.

Step 6: Save Your Changes

After loading the LISP file, ensure you save your changes by clicking the Apply button within the CUI editor. Once you have confirmed your adjustments, select Close to exit out of the editor.

Frequently Asked Questions

Can AutoCAD LT Support AutoLISP?

AutoCAD LT does not natively support AutoLISP or the APPLOAD command, which restricts direct utilization of LISP routines that are commonplace in the full version of AutoCAD.

What Are the Key Differences Between AutoCAD and AutoCAD LT?

AutoCAD is equipped with both 2D and 3D drafting capabilities, along with advanced automation options. In contrast, AutoCAD LT is tailored for comprehensive 2D drafting, lacking the 3D functionalities and some automation features that AutoCAD offers.

Where Are LISP Files Typically Stored in AutoCAD?

LISP files are usually stored in designated folders within the AutoCAD installation directory. For example, you might find them in paths like C:\Program Files\Autodesk\AutoCAD 2025\Support, along with its subdirectories. Checking the support file paths in the Options dialog can confirm their locations.

About the author

Wei Zhang

Wei Zhang

Wei Zhang is a renowned figure in the CAD (Computer-Aided Design) industry in Canada, with over 30 years of experience spanning his native China and Canada. As the founder of a CAD training center, Wei has been instrumental in shaping the skills of hundreds of technicians and engineers in technical drawing and CAD software applications. He is a certified developer with Autodesk, demonstrating his deep expertise and commitment to staying at the forefront of CAD technology. Wei’s passion for education and technology has not only made him a respected educator but also a key player in advancing CAD methodologies in various engineering sectors. His contributions have significantly impacted the way CAD is taught and applied in the professional world, bridging the gap between traditional drafting techniques and modern digital solutions.