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Using the DPSAuth.DLL COM Object, transactions are failing with ResponseCode “S4” and “S5”. Why is this failure occurring?

April 26, 2017failing failure object s4 S5 transactions

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Using the DPSAuth.DLL COM Object, transactions are failing with ResponseCode “S4” and “S5”. Why is this failure occurring?

1 Answer

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“S4” and “S5” indicate that DPSAuth.DLL COM object has established a connection to the Payment Express Server installed at the Merchant Site, but that the link upstream from the Payment Express Server to the Payment Express Host is not active or online.