Why did I get API error code 10011?

Issue
PayPal returned error code 10011 - Invalid transaction ID.

Cause
The transaction was refused because the API call passed an invalid transaction ID value.

Solution
Review the transaction ID referenced in the API call. Verify that the transaction ID is correct and contains no preceding or trailing spaces.

Note: See the Developer Portal for a complete list of NVP/SOAP API error codes.