Sam checked the version on his machine: SOLIDWORKS 2020 SP3. The license server’s admin panel reported SP2. Something in the handshake between client and server refused to reconcile their differences. The license key string — once a smooth handshake across the network — had become a miscommunication. He drafted a concise message to IT and pasted the thread into it, adding steps he’d tried and the error text.
Confirm that both machines are on the same network and you can successfully the server from the client. Add inbound and outbound firewall exceptions for TCP ports 25734 and 25735 , which are used by the SNL Manager. Resolve Component Mismatch
If running a firewall, ensure is checked (using default port 25735 ). Sam checked the version on his machine: SOLIDWORKS 2020 SP3
The error is a common FLEXnet licensing problem that blocks users from launching SOLIDWORKS 2020. This error indicates a critical communication mismatch or credential corruption between the local client software and the license validation system.
Go to your C:\Program Files\SOLIDWORKS SolidNetWork License Manager folder. Right-click server_remove.bat and . The license key string — once a smooth
This should be your absolute last resort. Before doing so, uninstall SOLIDWORKS, run a dedicated cleaner to remove leftover registry files, then restart and reinstall. A fresh, clean installation resolves many deeply rooted issues.
Activation files or registry entries have become inconsistent. FlexNet Incompatibility: Add inbound and outbound firewall exceptions for TCP
: Communication between your PC and the server is being blocked over specific TCP ports.
If reactivation doesn't work, manual conflicts in the background processes or temporary files often cause this error.
Select and click Next.