Have you encountered a different SOLIDWORKS licensing error? Share your experience in the comments below (on the original blog). For urgent help, consult the official Dassault Systèmes knowledge base article QA0000012345 (updated for 2020).
Right-click and select to clear any hung licensing services. Rename PDM Confict Files:
For most users, this error occurs around a maintenance renewal date and is resolved by refreshing the license. Have you encountered a different SOLIDWORKS licensing error
Encountering an "invalid inconsistent license key (-8, 544, 0)" error while trying to launch SolidWorks 2020 can be incredibly frustrating, effectively halting engineering design work. This error generally signifies that the license manager cannot validate the license file against the machine's configuration, or that licensing files were improperly installed or modified.
Since 2020 is no longer the "latest" version, Dassault Systèmes has shifted focus to newer releases. However, error 8,5xx codes are universal. If these fixes don't work, you might be dealing with a hardware failure (dying hard drive) or a firewall update that is blocking port 25734 . Right-click and select to clear any hung licensing services
: Standard windows firewalls or tight security permissions on network routers can block specific communication ports (usually TCP/UDP 25734 and 25735) between the workstation and server.
: Open Windows Services (services.msc). Locate SOLIDWORKS Licensing Service and set it to Automatic . Locate Flexnet Server , set it to Automatic (Delayed) , and manually Restart both. This error generally signifies that the license manager
Solving "Invalid Inconsistent License Key 8 544 0" in SOLIDWORKS 2020: A Comprehensive Guide
Sometimes the license needs to be completely returned to the SOLIDWORKS server before it can be used again.