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Article ID: 117082, created on Sep 3, 2013, last review on Jul 14, 2018

  • Applies to:
  • Business Automation


PayPal refund or other transaction perfomed in direct mode fails with the following error message:

HTTP operation failed with error code 35

The error message is displayed in the e-transactions log in PBA Provider Control Panel. Also, the error message may be found in the system log file PAYPAL.log on the PBA Management Node.


SSL API certificates are configured incorrectly in the PayPal payment plug-in settins in PBA.

Note: even if Paypal is configured to work in redirect mode, refund is still being performed in direct mode.


  1. Verify that PayPal certificate and key are correct using the commands like these on the PBA Management Node:

    openssl x509 -noout -text -in cert.pem    
    openssl rsa -noout -text -in key.pem

    Replace cert.pem and key.pem in the command above with the actual names of SSL certificate and private key.

  2. Verify that the full path to the certificate files in the PayPal payment plug-in settings is correct:

    • Log into PBA Provider Control Panel
    • Go to Configuration Director > E-Commerce Settings > Processing Centers > PayPal Processing Center
    • Make sure that the following parameters are correct:
      • API cert location
      • API key location

Refer to the PayPal Plug-in Configuration Guide for more details.

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