This error typically occurs when your system lacks the updated root certificates required to verify the digital signature of the KEPServerEX installer. It is most common on machines without active internet access or those with disabled Windows Updates.
) to identify exactly which certificate check is failing (e.g., error code This error typically occurs when your system lacks
The Exclusive Resolution
Download and Install Kepware’s Certificate: Bypass (Not Recommended – Only for Trusted Internal
For legacy systems where security validation is not critical, you can disable root certificate verification using a command-line switch (if supported by the Kepware installer version): This error typically occurs when your system lacks
Self-Signed Certificates: If you are trying to connect via OPC UA after installation and see certificate errors, you may need to use the OPC UA Configuration Manager to manually trust the server's self-signed certificate.
This error typically occurs when your system lacks the updated root certificates required to verify the digital signature of the KEPServerEX installer. It is most common on machines without active internet access or those with disabled Windows Updates.
) to identify exactly which certificate check is failing (e.g., error code
The Exclusive Resolution
Download and Install Kepware’s Certificate:
For legacy systems where security validation is not critical, you can disable root certificate verification using a command-line switch (if supported by the Kepware installer version):
Self-Signed Certificates: If you are trying to connect via OPC UA after installation and see certificate errors, you may need to use the OPC UA Configuration Manager to manually trust the server's self-signed certificate.