81002 Unspecified Method Error

Usinging Zencart 151, Paypal Pro.

Just activated Free Shipping Module. Paypal charged shipping and we are getting this message:

Dear store owner,
An error occurred when attempting to initiate the payment-validation
transaction. As a courtesy, only the error "number" was shown to your
customer. The details of the error are shown below.

81002
Unspecified Method
Method Specified is not Supported





Zen Cart message: 81002 [] Unspecified Method - Method Specified is not
Supported



Problem occurred while customer 7 Beth was attempting checkout with PayPal
Website Payments Pro.

Transaction Response Details: Array
(
[ACK] => Failure
[L_ERRORCODE0] => 81002
[L_SHORTMESSAGE0] => Unspecified Method
[L_LONGMESSAGE0] => Method Specified is not Supported
[L_SEVERITYCODE0] => Error
[CURL_ERRORS] =>
)


Followed by Transaction Submission: Array which had customer order info.

Thanks.

The only reason it would charge shipping is if your shipping rules/modules are set such that shipping still applies to the order.

The email content you posted says something went wrong, but doesn't contain enough info to explain the cause. For that, you need to post the actual logs from the PayPal transaction: http://www.zen-cart.com/showthread.p...Logging-PayPal and once you've turned on the debug-logging (as explained at that link) then you'll need to recreate the problem by making the same purchase in your store.
So, while you're at it, prepare a click-by-click list of steps which can be used to consistently trigger the same problem every time, and post that along with the paypal logs for the transaction.