title: PayFlow Pro error -104 "Unexpected transaction state"
body: <p>I develop for a credit card processing application that works with PayFlow Pro (among other processors). One of our customers is seeing a "Unexpected transaction state" result when submitting an authorization to PayFlow Pro.</p>
  
  <p>I've found the result listed in the developer docs <a href="https://developer.paypal.com/docs/classic/payflow/fraud-protection/#result-values-for-communications-errors" rel="nofollow noreferrer">here</a>, but it does not provide any information as to the cause or how to fix it. Is there anywhere that I can find more information on this issue? PayPal doesn't seem to provide a way to contact them directly regarding development questions, and just points me here.</p>