Blocking these hosts is often done to bypass "Checking for Updates" delays or for troubleshooting license manager connectivity in private networks. If you are experiencing an "Installation failed" error, you may also need to repair the installation through the Windows Control Panel. Are you trying to resolve a specific error code during the installation process?
: For modern cloud-connected versions, deleting the 3DEXPERIENCELauncher folder in C:\Programdata\DassaultSystemes\ and restarting can resolve stubborn installation hangs. 4. Summary Table of Resolutions Location/File Resolution Blank Install Screen \sldim\lang\english\HTML\frameset.html Right-click Properties -> Unblock Hosts Write Error C:\Windows\System32\drivers\etc\hosts Disable AV "Lock Hosts" setting; check Read-only status PDM Server Not Found C:\Windows\System32\drivers\etc\hosts Manually add [IP Address] [Server Name] Activation Blocked Windows Firewall Create Outbound Rule to "Allow connection" solidworks host file block install
: Look for any lines that don't start with a # . Specifically, look for entries related to "SolidWorks" or "Dassault" that might be redirecting traffic to 127.0.0.1 (localhost), which effectively blocks the connection. Blocking these hosts is often done to bypass
If you are looking for the specific entries to add to your Windows hosts file to prevent SOLIDWORKS from communicating with license validation servers during an installation or startup, you typically use the following lines. Hosts File Entries Specifically, look for entries related to "SolidWorks" or
: If you are installing from a network license or PDM server and the DNS is failing, add a new line at the bottom: [Server IP Address] [TAB] [Server Name] .