Why did I get API error code 10601?
PayPal returned API error code 10601 - Authorization expired.
Cause
You tried to perform a DoAuthorization, DoCapture, DoReauthorization, or a DoVoid on an expired Authorization.
Solution
Contact the customer and ask for their payment details again. Either process the transaction manually or cancel the expired order and get them to submit a new one.
See Also:
Authorization and Capture
See the Developer Portal for a complete list of NVP/SOAP API error codes.