Solidworks Host File Block Fix |top| -

To resolve SOLIDWORKS connectivity issues, specifically when a client machine cannot communicate with the license or PDM server, modifying the Windows

10) Quick checklist (summary)

Connectivity Errors: Getting "Bad Data" errors or unable to log into the PDM vault view despite being on the same network. solidworks host file block fix

Locate the FileIn Notepad, go to File > Open. Navigate to the following directory:C:\Windows\System32\drivers\etc\Note: Change the file type filter in the bottom-right corner from "Text Documents (.txt)" to All Files (.) to see the hosts file.* [ ] Backup hosts file [ ] Remove/comment

  1. Admin Rights: Yes? Proceed.
  2. Lines added: You copied the 7+ domain blocks.
  3. Saved correctly: No .txt extension.
  4. Flushed DNS: Commands run in CMD.
  5. Firewall Rule: Blocked SLDWORKS.exe outbound.
  6. License Path: Set to localhost or your specific server.

Read-Only Errors: Inability to save changes because the file or its parent folder is marked as "Read-only" at the Windows system level. Connectivity Errors : Getting "Bad Data" errors or

: At the bottom of the file, add a new line with the server's IP address, a tab or space, and then the server name. 192.168.1.50 MyPDMSERVER Save and Flush DNS : Save the file, then open a Command Prompt and type ipconfig /flushdns to apply the changes immediately. GoEngineer 2. Resolving "Access Denied" or Blocked Changes If you cannot save the file or it keeps resetting, check these common blocks: Antivirus Interference : Security software like SentinelOne often locks the file to prevent malware.

Furthermore, malicious antivirus software and "PUP" (Potentially Unwanted Program) cleaners sometimes see leftover entries from old cracks and "fix" them by blocking SolidWorks altogether. Suddenly, your legit license is broken by a ghost from the past.

2. License Error: -15, -5

"Cannot connect to license server system. The license server has been modified."