Hello Jonathan,
Try adding the Currency node to the XML:
<BusinessPartner>
<CardCode>10093325</CardCode>
<CardName>xxxxxx</CardName>
<CardType>cSupplier</CardType>
<GroupCode>107</GroupCode>
<Phone1></Phone1>
<Phone2></Phone2>
<CardForeignName></CardForeignName>
<FederalTaxID>xxxxxx</FederalTaxID>
<Fax></Fax>
<Cellular></Cellular>
<EmailAddress></EmailAddress>
<Website></Website>
<Notes></Notes>
<PayTermsGrpCode>-1</PayTermsGrpCode>
<IntrestRatePercent>0.000000</IntrestRatePercent>
<PriceListNum>1</PriceListNum>
<DiscountPercent>0.000000</DiscountPercent>
<CreditLimit>0.000000</CreditLimit>
<MaxCommitment>0.000000</MaxCommitment>
<Address>PTA Nº 02</Address>
<Currency>##CURRENCY##</Currency>
<BPAddresses>
<BPAddress>
<AddressName>xxxx</AddressName>
<Street>xxx</Street>
<Block></Block>
<ZipCode>1221</ZipCode>
<City>GUATIRE</City>
<County></County>
<Country>VE</Country>
<State>MIR</State>
<FederalTaxID></FederalTaxID>
<TaxCode></TaxCode>
<BuildingFloorRoom></BuildingFloorRoom>
<AddressType>bo_BillTo</AddressType>
<AddressName2></AddressName2>
<AddressName3></AddressName3>
<TypeOfAddress></TypeOfAddress>
<StreetNo></StreetNo>
<BPCode>xxxx</BPCode>
<RowNum>0</RowNum>
<GlobalLocationNumber></GlobalLocationNumber>
</BPAddress>
</BPAddresses>
<ContactEmployees />
<BPAccountReceivablePaybleCollection>
<BPAccountReceivablePayble>
<AccountType>bpat_OpenDebts</AccountType>
<AccountCode>2103001001</AccountCode>
<BPCode>10093325</BPCode>
</BPAccountReceivablePayble>
</BPAccountReceivablePaybleCollection>
<BPPaymentMethods />
<BPWithholdingTaxCollection />
<BPPaymentDates />
<BPBranchAssignment />
<BPBankAccounts />
<BPFiscalTaxIDCollection />
<DiscountGroups />
<BPIntrastatExtension></BPIntrastatExtension>
</BusinessPartner>