DSIXReturnCode 3328 Amount Not Acknowledged

Hi there,

Could you please explain what the error below actually means? I checked the integration documents and found nothing about it. Thanks.

Response with an error:

<CmdResponse>

<ResponseOrigin>Client</ResponseOrigin>

<DSIXReturnCode>003328</DSIXReturnCode>

<CmdStatus>Error</CmdStatus>

<TextResponse>TRANSACTION NOT COMPLETE - Amount Not Acknowledged.</TextResponse>

<SequenceNo>0010010010</SequenceNo>

<UserTrace>TEST</UserTrace>

</CmdResponse>

The request:

<Transaction>

    <HostOrIP>127.0.0.1</HostOrIP>

    <IpPort>9000</IpPort>

    <MerchantID>***************</MerchantID>

    <TerminalID>***************</TerminalID>

    <OperatorID>***************</OperatorID>

    <UserTrace>***************</UserTrace>

    <TranCode>EMVSale</TranCode>

    <SecureDevice>EMV_ISC250_MERCURY</SecureDevice>

    <ComPort>6</ComPort>

    <RefNo>951882395157</RefNo>

    <InvoiceNo>951882395157</InvoiceNo>

    <SequenceNo>0010010010</SequenceNo>

    <Memo>***************</Memo>

    <Amount>

      <Purchase>5.10</Purchase>

    </Amount>

    <PartialAuth>Allow</PartialAuth>

    <RecordNo>RecordNumberRequested</RecordNo>

    <Frequency>OneTime</Frequency>

  </Transaction>

</TStream>