Solidworks Host File Block Fix ❲TRENDING – TUTORIAL❳

SolidWorks: Host File Block Fix — Step-by-Step Guide

If your DNS is failing to resolve the server name, you can manually add the server's IP address to the hosts file as a temporary workaround.

"License server does not support this version."
"Cannot connect to license server (-15,10)."
"SolidWorks is unable to establish a connection with the license manager."

Read-Only Errors

: Inability to save changes because the file or its parent folder is marked as "Read-only" at the Windows system level. solidworks host file block fix

Delete only those specific lines. Do not delete the # localhost line.

Save the file (Ctrl+S).

Go back to Properties and re-check "Read-only" (This prevents future malware from hijacking it).

Step 1: Locate the Hosts File

Save the hosts file (File → Save).
Open Command Prompt as administrator and run: ipconfig /flushdns
Restart the machine (recommended) or restart the SolidWorks License Service.