Incoming Invoice Create from data without posting the GR details

Question

Hi Experts,
I am trying to create a MM invoice (MIRO) using the BAPI BAPI_INCOMINGINVOICE_CREATE and I do not want to post GR details in this invoice. But I have not been able to see the face of success yet.
Following are the parameters that I pass to the structures of this BAPI:
BAPI_INCINV_CREATE_ADDRESSDATA Addressdata = new BAPI_INCINV_CREATE_ADDRESSDATA();
BAPI_INCINV_CREATE_HEADER Headerdata=new BAPI_INCINV_CREATE_HEADER();
BAPI_INCINV_CREATE_ACCOUNTTable Accountingdata = new BAPI_INCINV_CREATE_ACCOUNTTable();
BAPI_INCINV_CREATE_ACCOUNT Account = new BAPI_INCINV_CREATE_ACCOUNT();
BAPI_INCINV_CREATE_ITEMTable Itemdata = new BAPI_INCINV_CREATE_ITEMTable();
BAPI_INCINV_CREATE_ITEM Item = new BAPI_INCINV_CREATE_ITEM();
BAPI_INCINV_CREATE_GL_ACCOUNTTable Glaccountdata=new BAPI_INCINV_CREATE_GL_ACCOUNTTable();
BAPI_INCINV_CREATE_GL_ACCOUNT Glaccount = new BAPI_INCINV_CREATE_GL_ACCOUNT();
BAPI_INCINV_CREATE_MATERIALTable Materialdata = new BAPI_INCINV_CREATE_MATERIALTable();
BAPIRET2Table Return=new BAPIRET2Table();
BAPI_INCINV_CREATE_TAXTable Taxdata = new BAPI_INCINV_CREATE_TAXTable();
BAPI_INCINV_CREATE_VENDORSPLITTable Vendoritemsplitdata = new BAPI_INCINV_CREATE_VENDORSPLITTable();
BAPI_INCINV_CREATE_WITHTAXTable Withtaxdata = new BAPI_INCINV_CREATE_WITHTAXTable();
string Fiscalyear="", Invoicedocnumber="";
Headerdata.Invoice_Ind = "X";
Headerdata.Bus_Area = "ED";
Headerdata.Comp_Code = "GAMB";
Headerdata.Doc_Date = "20110505";
Headerdata.Bline_Date = "20110505";
Headerdata.Doc_Type = "RE";
Headerdata.Diff_Inv = "0001736123";
Headerdata.Currency = "USD";
Headerdata.Exch_Rate = 7.33M;
Headerdata.Po_Ref_No = "4510146624";
Headerdata.Gross_Amount = 87500.00M;
Headerdata.Header_Txt = "";
Headerdata.Inv_Rec_Date = "20110505";
Headerdata.Pmnttrms = "G001";
Headerdata.Pmnt_Block = "A";
Headerdata.Ref_Doc_No = "Inv01";
Headerdata.Pstng_Date = "20110505";
Headerdata.Calc_Tax_Ind = "X";
Headerdata.Person_Ext = "extsuro";
BAPI_INCINV_CREATE_MATERIAL Material = new BAPI_INCINV_CREATE_MATERIAL();
Material.Invoice_Doc_Item = "0001";
Material.Material = "W900000664";
Material.Val_Area = "PL01"; // plant
Material.Db_Cr_Ind = "S";
Material.Item_Amount = 70000.00M;
Material.Quantity = 200.00M;
Material.Base_Uom = "EA";
Material.Tax_Code = "I1";
Materialdata.Add(Material);
Item = new BAPI_INCINV_CREATE_ITEM();
Item.Invoice_Doc_Item = "0001";
Item.Po_Number = "4510146624";
Item.Po_Item = "00010";
Item.De_Cre_Ind = "X";
Item.Freight_Ven = "0000010149";
Item.Tax_Code = "I1";
Item.Item_Amount = 70000.00M;
Item.Quantity = 200.00M;
Item.Po_Unit = "EA";
Item.Po_Unit_Iso = "EA";
Itemdata.Add(Item);
proxyPOInvoice.Bapi_Incominginvoice_Create(Addressdata, Headerdata, out Fiscalyear, out Invoicedocnumber,
    ref Accountingdata, ref Glaccountdata, ref Itemdata, ref Materialdata, ref Return, ref Taxdata, ref Vendoritemsplitdata, ref Withtaxdata);
This is resulting in the below error message:
u2022     Enter goods receipt data only when working with GR-based IV
For the first error messages, after some good amount of googling and also searching in this forum I could reach to this conclusion that, if PO is marked with GR-based IV flag then invoice cannot be booked without GR. Also while booking such as invoice for every GR Item we need to pass:
Ref_Doc = goods recript number,
Ref_Doc_Year = year for good receipt number
and Ref_Doc_It = item number in the goods receipt.
I have created a PO which is not GR-based IV flagged, i.e. GR is not mandatory for creating invoice. Still I get the same message every time. I went through the documentation of the BAPI and also through many sites that gave sample codes to create an MM invoice but without any success.
The same entry when I enter through SAP screens I am able to post the invoice without GR.  Please help me identify where I am going wrong.
Thanks in Advance
Best Regards
Roy

Answer 1

I found out the cause to this whole thing. It seems that even though if you don't need to pass a parameter you need to fill it with default value. e.g.
my invoice was not GR-based IV invoice. Therefore, I don't actually need to pass values for:
REF_DOC
REF_DOC_IT &
REF_DOC_YEAR.
Well i was wrong here. Even then I need to pass these values as:
REF_DOC = ""
REF_DOC_IT = "0000"
REF_DOC_YEAR = "0000"
I guess this is how SAP .Net Connector works.
Thanks to all anyway
Roy