Solidworks Host File Block Fix

You will see a confirmation message stating that the DNS Resolver Cache was successfully flushed.

Double-click the file named (it will not have a file extension). Step 2: Identify and Remove SolidWorks Blocks

: Use Ctrl + Q to perform a deep rebuild of the entire document from the ground up. solidworks host file block fix

What or message pops up when you launch the software?

If your SolidWorks software suddenly refuses to launch, throws activation errors, or hangs on the splash screen, the root cause might be your Windows Hosts file. Companies and network administrators often use the Hosts file to manage network traffic, but incorrect configurations can accidentally block SolidWorks from communicating with its licensing servers. You will see a confirmation message stating that

remove the lines starting with # (these are comments) or lines that look like 127.0.0.1 localhost . 4. Save and Exit Go to File > Save and close Notepad. Step 3: Clear DNS Cache

The Windows is a critical system file that maps hostnames to IP addresses, acting as a local DNS override. For SOLIDWORKS users, a "host file block" typically refers to connectivity issues where the software cannot reach the license server or PDM database because of misconfigured entries or security software preventing file modifications. Identifying the Cause of the Block What or message pops up when you launch the software

: If the host file is correct but you still can't connect, ensure TCP ports 25734 and 25735 are open in your Windows Firewall for the SolidNetWork License (SNL) Manager .