These relate to specific software builds or version mismatches.
If you are an admin supporting a user, ask these three questions to pinpoint the error category:
By systematically working through these 20 points, you can resolve the vast majority of AutoCAD license checkout failures.
[ADLM] 20: Generic license checkout error (often accompanied by ADLSDK_STATUS_AUTH_PENDING
occurs when AutoCAD's licensing component fails to verify your credentials . This is typically caused by a corrupted Autodesk Desktop Licensing Service or a service that has stopped running. Quick Fixes Restart Services : Open the Windows services.msc Autodesk Desktop Licensing Service , right-click it, and select . Ensure the Startup Type Run as Admin : Right-click your AutoCAD shortcut and select Run as Administrator to bypass potential permission issues. Check Date/Time
: Ensure your system clock is accurate, as synchronization errors can break the license handshake. Standard Solution: Reinstall Licensing Service 20 generic license checkout error autocad
If restarting the service doesn't work, you must perform a clean reinstall of the licensing component:
Troubleshooting AutoCAD Error: "License Checkout Timed Out" If you are seeing a generic license checkout error (often appearing as "License checkout timed out" or code 20), it generally means your software cannot communicate with the Autodesk Desktop Licensing Service
. This guide covers the most effective ways to get back to work. 1. Update Critical Components
Most licensing errors are resolved by ensuring your background services are up to date. You can download these directly from your Autodesk Account or the links below: Autodesk Desktop Licensing Service : Install the latest update for your version. Autodesk Identity Manager : Required for 2024 versions and newer. AdSSO (Single Sign-On) : Required for versions 2020 through 2023. 2. Verify the Licensing Service is Running
The software may fail to launch if the background service has stopped or is stuck. services.msc , and hit Enter. Autodesk Desktop Licensing Service Right-click it and select . If it is not running, select Ensure the "Startup Type" is set to 3. Repair or Reinstall the Service These relate to specific software builds or version
If the service is corrupted, a clean reinstall of the licensing component (rather than the whole AutoCAD suite) often fixes the issue. Navigate to:
C:\Program Files (x86)\Common Files\Autodesk Shared\AdskLicensing uninstall.exe as an administrator. Download and reinstall the latest version from the Autodesk Licensing Service download page 4. Reset the License Cache
If your license type changed or the "Let's Get Started" screen is stuck, you may need to reset the login state. : In AutoCAD, type in the command line, click Manage License , and select Change License Type
: Close all Autodesk apps and delete the login cache folder located at: %localappdata%\Autodesk\Web Services\LoginState.xml 5. Check Security Settings
Firewalls and antivirus programs can block the licensing service's heartbeat. Ensure the following URLs are whitelisted in your security software: *.autodesk.com *.autodesk360.com *.google-analytics.com Still stuck? To help me narrow this down, please let me know: of AutoCAD are you using (e.g., 2024, 2021)? Are you on a Single-user (Sign-in) or Does the error happen immediately at launch or after working for a while? "Did this work yesterday
Your AutoCAD License Is Not Valid – How To Fix This Error Quickly
Remnants of old installations often linger in HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk, confusing the new licensing service.
Several factors can trigger this error. The most frequent include:
The most frequent culprit. Autodesk stores license information in the ProductInformation.pit file and within the Licensing folder. If these become corrupted due to a system crash or improper shutdown, Error 20 appears.
Here is the definitive sequence to resolve Error 20. Follow these steps in order.