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Error Message 20133 - Invalid Import List Header

Question asked by ef866d7aae13ac5435d82ee68c32b7631a16dd59 on Jun 30, 2015
Latest reply on Jun 30, 2015 by e276a4fdb2c7d8ab0f4ca9a397ce2f4ad8981e4a

Our company uses Marketo as a customer integration with the application our company supports.  I don't know a lot about SOAP and APIs, ect, but the integration is used with these account details:


  • Marketo Account Number
  • Marketo Encryption Key
  • Marketo SOAP API Endpoint
  • REST API Endpoint
  • REST API Identity


When a user processes the request for a test email campaign, the Error Message 20133 - Invalid Import List Header is always the ending result.


Can anyone tell me what this error is and maybe how to resolve the issue? I would greatly appreciate it!