Article - CS324697
Error "Client or Server Certificate is invalid" when using OPC UA Client driver in PTC Kepware Products
Modified: 02-Jan-2025
Applies To
- KEPServerEX 6.0.2107.0 to 6.17
- ThingWorx Kepware Server 8.0 to 6.17
Description
-
Error in event log when using OPC UA Client driver:
The Client or Server Certificate is invalid. Please use the OPC UA Certificate Manager to configure the certificate
- The server certificate has been trusted successfully in the OPC UA Certificate Manager > Trusted Servers
- The certificate is self-issued and self-signed
- Secure OPC UA connection to Siemens S7-1500 fails with certificate error
This is a printer-friendly version of Article 324697 and may be out of date. For the latest version click CS324697