Invalid -inconsistent- License: Key --8 544 0- Solidworks 2020

  • Restart SolidWorks and re-enter the license key.

    • If none of the above solutions work, your best course of action is to contact your SolidWorks Value Added Reseller (VAR) for technical support.

    Software License Key Error Report

    Error Message: "invalid -inconsistent- license key --8 544 0- solidworks 2020"

    Software: SolidWorks 2020

    Error Description:

    The error message indicates that there is an issue with the license key used to activate SolidWorks 2020. The specific error code is "-inconsistent- license key --8 544 0-", suggesting that the license key is either invalid, corrupted, or not properly configured.

    Possible Causes:

    Recommendations:

    Troubleshooting Steps:

    Resolution:

    If none of the above troubleshooting steps resolve the issue, it is recommended to contact the software vendor or reseller for further assistance with license validation or to obtain a new license key.

    The SOLIDWORKS error (-8, 544, 0) typically indicates that the licensing information is inconsistent or out of date, often occurring because your maintenance subscription recently expired or renewed and the license manager needs a refresh. Common Solutions for Official Licenses Restart SolidWorks and re-enter the license key

    If you are using a legitimate license (especially a SolidNetWork License), the most effective fix is to reactivate the product on your license server to update the maintenance dates.

    Access the Server: Log in to the computer or server where the SolidNetWork License Manager is installed.

    Stop the Service: Open the License Manager, go to the Server Administration tab, and click Stop.

    Reactivate: Click Modify, select "Activate/Reactivate your product license(s)", and follow the on-screen prompts.

    Restart: Once finished, click Start in the Server Administration tab to resume licensing services. Alternative Fixes

    Clear FlexNet Files: Navigate to C:\ProgramData\FLEXnet and locate files starting with SW_D. Moving or deleting these (after backing them up) can sometimes force a clean license check.

    Repair Installation: Use the Windows Control Panel > Programs and Features, select SOLIDWORKS, click Change, and choose Repair your installation.

    Check Updates: Ensure you are on the latest Service Pack for SOLIDWORKS 2020 (SP5), as it contains the most stable licensing fixes for that version. Troubleshooting Non-Official Installations

    For users encountering this on modified versions, community guides suggest the following steps (at your own risk): How to Refresh SOLIDWORKS Network Licenses

    SolidNetWork License Manager requires specific ports to be open to verify the license key. If Windows Defender or a third-party antivirus recently updated, it may have blocked these ports.

    Since error 544 often relates to blocked reads, add these exceptions to your antivirus: If none of the above solutions work, your

  • Processes to exclude:

    • After adding exclusions, restart and test.

    Common causes:

    Client-side troubleshooting:

  • If ping fails, check DNS or network routing.
  • Test license port connectivity:
  • Confirm server name/IP in SolidNetWork License Manager setup:
  • Check firewall/antivirus:
  • Ensure correct version compatibility:
  • Clear client license cache:
  • Re-launch SOLIDWORKS and request license from server.

    • Server-side checks

  • Check license file and host ID:
  • Review usage and license expiration:
  • Check FLEXnet debug logs:
  • Reinstall/repair SNL:
  • Port conflicts / multiple license managers:

    • If you see Invalid - inconsistent - license key --8 544 0- on SolidWorks 2020:

    For the rest, remember: SolidWorks 2020 is a museum piece of licensing architecture. Treat it gently, keep a ghost image of your working system, and never, ever let Windows Update run unattended the night before a design review.

    The -8,544,0 isn't just an error. It's a warning.

    The error message "Invalid (inconsistent) license key (-8, 544, 0)" in SOLIDWORKS 2020 typically occurs when the local software and the license manager are out of sync, often after a subscription renewal or a software update. Why This Happens

    This specific error is common for add-ins like SOLIDWORKS CAM or Visualize. Since these products are often tied to an active subscription, the license key becomes "inconsistent" if the license manager still has an old expiration date cached. How to Fix Error -8, 544, 0 1. Reactivate the SolidNetWork License (SNL) Manager

    If you are using a network license, the most common fix is to refresh the license on the server machine.

    Access the Server: Log in to the computer or server hosting the SolidNetWork License Manager. Recommendations:

    Stop the Service: Open the SNL Manager, go to the Server Administration tab, and click Stop.

    Reactivate: Click Modify, then select Activate/Reactivate your product license(s).

    Follow Prompts: Choose "Automatically over the internet" and complete the activation.

    Restart: Click Start in the SNL Manager to resume licensing services. 2. Check for Version Mismatch

    The License Manager must always be the same version or newer than the SOLIDWORKS software installed on client machines.

    If you recently upgraded to SOLIDWORKS 2020, ensure the license manager on the server has also been upgraded to the 2020 version (or later).

    You can download the latest manager through the SOLIDWORKS Installation Manager or official Customer Portal. 3. Standalone License Activation

    If you are not on a network and use an individual serial number: Open SOLIDWORKS and go to Help > Activate Licenses.

    Select the specific product (e.g., SOLIDWORKS CAM) and choose Automatically over the internet to refresh its status. 4. Reset the FlexNet Service Sometimes the licensing service itself gets stuck.

    Failed to Obtain License for – Invalid (Inconsistent) License Key

    If this error occurs on a client machine (a computer accessing the license from a server), the client may be looking at the wrong server address.