Duh.
All transaction type child nodes must contain the same document number. Please ensure your transaction is not missing this unique identifier for the element DOCNUMBR. (If you would like the document number generated, please ensure a document number value is not contained in the document number element DOCNUMBR.)
<eConnect xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<RMTransactionType>
<eConnectProcessInfo xsi:nil="true" />
<taRequesterTrxDisabler_Items xsi:nil="true" />
<taUpdateCreateCustomerRcd xsi:nil="true" />
<taCreateCustomerAddress_Items xsi:nil="true" />
<taRMCommissions_Items xsi:nil="true" />
<taRMTransactionTaxInsert_Items xsi:nil="true" />
<taRMDistribution_Items>
<taRMDistribution>
<RMDTYPAL>1</RMDTYPAL>
<DOCNUMBR>INV00000000000002</DOCNUMBR>
<CUSTNMBR>CD AUSTRALIA </CUSTNMBR>
<DISTTYPE>9</DISTTYPE>
<ACTNUMST>2205-</ACTNUMST>
<CRDTAMNT>3606.32000</CRDTAMNT>
</taRMDistribution>
<taRMDistribution>
<RMDTYPAL>1</RMDTYPAL>
<DOCNUMBR>INV00000000000002</DOCNUMBR>
<CUSTNMBR>CD AUSTRALIA </CUSTNMBR>
<DISTTYPE>3</DISTTYPE>
<ACTNUMST>2205-</ACTNUMST>
<DEBITAMT>3606.32000</DEBITAMT>
</taRMDistribution>
</taRMDistribution_Items>
<taAnalyticsDistribution_Items xsi:nil="true" />
<taRMTransaction>
<RMDTYPAL>7</RMDTYPAL>
<DOCNUMBR>INV00000000000002-001</DOCNUMBR>
<DOCDATE>9/19/2014</DOCDATE>
<BACHNUMB>CONSOL1009</BACHNUMB>
<CUSTNMBR>CD AUSTRALIA </CUSTNMBR>
<DOCAMNT>3606.32000</DOCAMNT>
<SLSAMNT>3606.32000</SLSAMNT>
<DOCDESCR>SH12/05028 SUM </DOCDESCR>
<CSTPONBR>INV00000000000002</CSTPONBR>
<PYMTRMID>1% 30 NET 31</PYMTRMID>
</taRMTransaction>
<taMdaUpdate_Items xsi:nil="true" />
</RMTransactionType>
</eConnect>