Solidworks Host File Block | Fix New!

Look for any lines containing solidworks or dassaultsystemes . those lines entirely. 4. Save and Exit Go to File > Save . Close Notepad. 5. Flush Your DNS Cache

Push a GPO that:

To resolve issues where SOLIDWORKS (particularly PDM) cannot connect to a server or where an installation is blocked by the Windows file, follow this guide to modify or unblock the file. 1. Fixing DNS/Connectivity via the Hosts File

While useful for temporary troubleshooting, the hosts file block fix for license validation is fragile and unsustainable. For critical design work, a licensed version of SOLIDWORKS is essential for legal compliance, security, and accessing support and updates. If you have a valid license and are experiencing persistent activation problems, the most reliable solution is to contact official SOLIDWORKS support. solidworks host file block fix

Execute the command: ping SERVERNAME (replace with your actual server name).

How to Configure the Local HOSTS file to Resolve Server Name

How to Configure the Local HOSTS file to Resolve Server Name Look for any lines containing solidworks or dassaultsystemes

Here is the irony. In 2020 and beyond, Dassault Systèmes (SolidWorks' parent company) updated their licensing kernel. They introduced a "Self-Healing" mechanism. When SolidWorks starts, it now:

: The hosts file may be set to "Read-only" or requires administrative privileges to modify.

) has specific features that lock the hosts file to prevent hijacking. Save and Exit Go to File > Save

By default, Notepad only displays .txt files, making the folder look empty. In the bottom-right corner of the Open dialog box, change the dropdown menu from to All Files ( . ) .

The Windows operating system safeguards network configuration directories from unauthorized changes. Click the Windows . Type Notepad into the search bar. Right-click Notepad and choose Run as Administrator . Step 3: Navigate to the Drivers Directory Inside Notepad, click File > Open .

Once the file opens, you will see a mix of text lines starting with # symbols (which are notes/comments) and lines with IP addresses. Scroll to the very bottom of the document. Look for lines containing keywords like: solidworks 3ds flexlm ://solidworks.com

It is a short-term workaround. If the server’s IP changes, the connection will break again. 2. Unofficial Use: Blocking License Checks

Double-click the file named (it will not have a file extension). Step 3: Remove SolidWorks Blocks Scroll to the bottom of the document.