If the files were corrupted by Windows updates or a silent antivirus sweep, you need to patch it again.
Why does this error pop up for some users and not others? Here are the five most common culprits.
If you are using the Team Solidsquad (SSQ) activation method, the "Error 6" often means the local server wasn't properly registered. Navigate to your original installation folder and find the _SolidSQUAD_ SOLIDWORKS 2018 Activator (or similar script) as an Administrator
Scroll down to HKEY_LOCAL_MACHINE\Software\Wow6432Node\SolidWorks (if applicable) and clear it as well. Team Solidsquad Solidworks 2018 Error 6
Troubleshooting Team Solidsquad Solidworks 2018 Error 6: Causes and Solutions
: The third-party activation executable modifies low-level system strings without elevated permissions, forcing Windows to instantly terminate the process.
Disconnect your computer from the internet completely to prevent automatic cloud-based remediation blocks during activation. Re-run the activator. Method 3: Forcible Cleanup of Overlapping Registry Keys If the files were corrupted by Windows updates
While SolidWorks 2018 is highly valued by designers for its legacy part design stability, modern operating systems like Windows 11 introduce strict security protocols that block unauthorized registry modifications, triggering the Error 6 popup. This article breaks down why this error occurs and provides clear steps to resolve it. Root Causes of Error 6: Access Violation
Community feedback on engineering forums demonstrates that a clean installation of SOLIDWORKS 2018 directly onto Windows 11 frequently triggers Error 6. A reliable, albeit complex, alternative path involves an OS upgrade cascade: Install a clean build of on the machine.
Sometimes the license server path gets wiped. If you are using the Team Solidsquad (SSQ)
: Navigate to the following script folder from your setup files, right-click the SolidSQUAD.SolidWorks.2018.Activator.reg file, and choose Merge to write clean values back into your registry structure. 🔌 Phase 4: Overriding Local Port Blocks
Based on hundreds of user reports, the three main culprits are:
Verify that the SOLIDWORKS 2018 software boots up and functions successfully.