2025年05月16日

Found an annoying error in Siemens TIA Portal which did not happen a long time ago.

FIX: See solution here.

Unhandled Exception: Siemens.Engineering.EngineeringSecurityException: Security error.
Can't access this process to acquire needed information.
Security error.
Owner 'username' of this process is not member of the windows group 'Siemens TIA Openness'.
Please contact your administrator.