Solidworks Host File Block Fix !!hot!! Jun 2026

If you want to dive deeper into troubleshooting, let me know:

Right-click the menu and select Terminal (Admin) or Command Prompt (Admin) . Type the following command and press Enter: ipconfig /flushdns Use code with caution.

To fix the issue, follow these steps:

The "hosts file block" is a common fix used when SolidWorks cannot connect to its license server (Error -15, 10, 10061) or when DNS issues prevent the software from "finding" your workstation or server. 🛠️ The Direct Fix: Modifying the Hosts File

The Windows host file acts like a local phone book for internet addresses. It maps specific website names to numeric IP addresses before your computer asks the internet at large. solidworks host file block fix

If editing the hosts file does not restore connectivity, consider these alternative solutions:

A default Windows Hosts file usually contains only commented lines that start with # . It doesn't contain active rules. The only active entry you might see is 127.0.0.1 localhost . If you want to dive deeper into troubleshooting,

SolidWorks network licensing relies on specific ports to communicate through your network. If the hosts file is clear, the firewall might still be dropping the packets.

If you still cannot connect after updating the hosts file, the block may be at the firewall level: 🛠️ The Direct Fix: Modifying the Hosts File

After saving the Hosts file, Windows may still remember the old, broken network routes due to local caching. You must flush your DNS cache to force the operating system to read your new Hosts file rules immediately. Press to open the Run dialog box. Type cmd and press Enter to open the Command Prompt.

Paste the following path into the address bar at the top and hit Enter: C:\Windows\System32\drivers\etc