Article - CS412176
Certificate import fail with Error "Failed to import the certificate. The format is invalid" in PTC Kepware Products
Modified: 24-Nov-2025
Applies To
- ThingWorx Kepware Server (legacy) 8.0 to 6.15
- Kepware Server (formerly KEPServerEX) 6.0.2107.0 to 6.18
Description
- Certificate import fail with Error "Failed to import the certificate. The format is invalid" in PTC Kepware Products
- I continue to get errors when attempting to install ssl certificates into the server application.
- I have validated the PEM formatted certificates using several methods yet Kepware does not accept it
- I am trying to import a certificate for the Configuration API Service so that I has use HTTPS
- No matter what I do, the import fails with Failed to import the certificate. The format is invalid
- I have tried with and without the private key
- I have tried exporting the certificate created by OpenSSL within kepware and then import that certificate back and even that certificate fails with format is invalid
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