: Interference from previous installations can cause "Error 6". Before re-activating, manually delete any remaining license files or folders related to the FLEXnet server from C:\ProgramData to ensure a fresh configuration. Install Missing Dependencies
"Error 6" in the context of SolidWorks 2018 installations using SolidSquad (SSQ) tools typically occurs during the license activation phase often triggered by an invalid license server configuration
or the activation tool failing to communicate with the Flexnet server Common Fixes for Error 6 Run Activation Scripts as Administrator