Hi,

I have installed the IPN PayPal payment module (german paypal service) and all works perfect (paypal transaction and order are successfully) but some clients get no confirm email from zen cart (version 1.3.8a).

paypal DB table has in this cases following entry:

txn_typ = unique
module_name =paypal (ipn-handler)
module_mode = IPN
payment_type = instant
payment_status = Completed

paypal_session table entry is not removed and the log shown:

"PDT WARNING :: Transaction already exists. Perhaps IPN already added it. PDT processing ended."

I can exclude a double order.

Has somebody any idea of what to do?