SolidWorks utilizes FlexNet licensing technology to verify authentic software seats over the internet or a local network. Why Blocks Occur
To resolve these network blocks, you must add static IP-to-hostname mappings directly to your Windows system files. Step 1: Gather Server IP Addresses
Fixing this issue requires modifying the Windows Hosts file to remove the blocking rules. Because this is a protected system file, you must use administrative privileges. Step 1: Open Notepad as an Administrator Click the Windows menu. Type Notepad into the search bar. Right-click on Notepad and select Run as administrator . Step 2: Locate the Hosts File In Notepad, click File in the top menu and select Open .
The SolidWorks host file block fix is a simple and effective solution to resolve issues related to SolidWorks being blocked by the Windows host file. By following the steps outlined in this report, users should be able to resolve the issue and successfully launch SolidWorks. solidworks host file block fix
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Editing system files requires administrator privileges. Do this on a domain-joined PC only if you have local admin rights.
Aggressive antivirus web-shields occasionally flag SolidWorks licensing traffic as suspicious. Temporarily disable your web shield or add *.solidworks.com to your antivirus exclusion list to test if it resolves the block. Because this is a protected system file, you
If you want, I can (A) scan a pasted hosts file and highlight suspicious lines, or (B) generate a printable one-page checklist. Which would you prefer?
The default port used for the SolidNetWork License Manager daemon.
If you are a SolidWorks user, particularly in a corporate or network licensing environment, you may have encountered the dreaded license activation error. Often, this error isn't caused by a wrong serial number, but by a misconfigured Windows that blocks communication with Dassault Systèmes' activation servers. Right-click on Notepad and select Run as administrator
To fix a SOLIDWORKS "host file block" error, you typically need to map your license server's IP address to its hostname within the Windows file or ensure your antivirus isn't preventing SOLIDWORKS from reading it . Quick Fix: Modifying the Windows Hosts File
Contact support or your reseller if: