You will almost never see this error with a legitimate, newly purchased standalone license. It appears predominantly in three scenarios:
To better understand the error and its solutions, let's dive deeper into the possible causes:
1. Reactivate the SolidNetWork License Manager (Network Administrators) You will almost never see this error with
If your environment utilizes a network license—such as at a workplace or university—the server's internal registration records must be forced to refresh. SOLVED!! | Invalid (inconsistent) license key. (-8544,0)
Click (or "Modify" for older versions) to refresh the license with the SolidWorks server. 4. Delete the FLEXnet Folder (Most Common Fix) SOLVED
Navigate to C:\ProgramData\FLEXnet (you may need to enable "Show hidden files" in Windows Explorer). Find files starting with SW_D (e.g., SW_D_tsf.data ).
Verify that the port numbers (default: 25734 and 25735) are added to the Windows Firewall allowed programs. Summary of Solutions Potential Cause Reactivate in SNL Manager Network Blocked Open ports 25734/25735 in firewall Server/Client Mismatch Verify Port@Server address Old Manager Version Upgrade SNL Manager to 2020+ You will almost never see this error with
In FlexNet licensing terms (the technology powering SolidWorks licensing), signifies an "Invalid license key" or "Inconsistent encryption codes."