LK# File Extension
Autodesk multi-user coordination lock data
- File Type lk#
- Popularity
- Application AutoCAD
- Category 3D Image Files
What is a LK# file?
The LK# extension is related to Autodesk multi-user coordination lock data and is classified in the 3D Image Files category, which contains 618 files.
LK# files are supported by Linux, Windows and Mac OS. To create a LK# file, you can choose from 2 programs such as AutoCAD Civil 3D and AutoCAD.
Programs that support LK# files
How to open a LK# file?
If you cannot open a LK# file, it is most often due to missing software. Select a program from the list according to your operating system. Then go to the official website of the program developer, download it, and install it on your device.
AutoCAD Civil 3D and AutoCAD stand out as the preferred programs to manage LK# files effectively. To install the current version of AutoCAD, go directly to the official Autodesk website. The universal package for all operating systems is available there.
After successful installation, your operating system should seamlessly handle LK# files via AutoCAD.
Set AutoCAD as the default LK# program
Change Default Program on Mac
- Right click or Control + left click on the desired LK# file;
- Choose "Open in Application" and click "Other";
- Go to the lower section of the window, where you will find the "Enable" menu. By default, it is set to "Recommended Programs";
- Select "All Programs" from this menu and proceed to search for AutoCAD. Check the box next to "Always open in app" to set it as the default option.
Set default programs for Windows
- Start by right-clicking on your LK# file, then select the "Open with" option and choose "Choose another app" from the menu that appears;
- In the pop-up window, select the AutoCAD application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening LK# files.
Solve problems with LK# files
LK# files may present some challenges, but most can be easily addressed with minor software tweaks. See the troubleshooting tips below for guidance.
What are the ways to check if my LK# file is damaged?
LK# 3d image files that have become corrupted may display one or more of the following symptoms:
- The file does not respond or shows errors when opening it;
- The file exhibits poor performance during editing operations in AutoCAD Civil 3D;
- The file stops responding or freezes in AutoCAD or other programs;
- Unexplained LK# file size inflation;
- Actions performed on the file result in the appearance of error notifications;
Why does AutoCAD crash or shut down frequently?
Insufficient updates for Autodesk products can cause AutoCAD to crash. Be sure to regularly install the latest software updates.
Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.
Is there any specific software or utility that can help repair a damaged LK# file?
Use a recovery program to open the damaged LK# file, and in the menu, click "Repair" to start the repair operation. Wait for the recovery process to finish, allowing automatic repair of damaged 3d image files.
How to edit a LK# file?
To make changes to LK# files, you need specialized software that allows both opening and editing the 3d image files. Online LK# editors offer fewer capabilities than applications optimized for Autodesk multi-user coordination lock data.
Best LK# Editor Software in 2026
With the mentioned criteria in mind, we have assembled a selection of LK# editors.
| LK# Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| AutoCAD | Autodesk | Windows, Mac OS | 4.4 out of 5 (37 reviews) |
| AutoCAD Civil 3D | Autodesk | Windows, Mac OS, Linux | 4.2 out of 5 (38 reviews) |