How to find the invoice number from accounting document number?

Question

Hi
I am using the bapi BAPI_AP_ACC_GETSTATEMENT and trying to get the invoice numbers of all the payments.
but i am unable to find the link between the accounting document number from the bapi and the vendor invoice number.
i have tried the tables BSE_CLR, BSEG and BKPF. the field AWKEY in BKPF has the combination of BELNR & BUKRS & GJAHR when the document type is anything other than RE.
How can i get the invoice numbers from the accounting doc. numbers?
Regards
Sujai

Answer 1

I am unable to find the link between BKPF-BELNR and RBKP-BELNR from the bapi return values.
XBLNR is blank when i check the table.
the output of the bapi is something like this                                                                               
COMP VENDOR   CLEAR_DATE CLR_DOC_NO ALLOC_NMBR   FISC   DOC_NO     ITE
                                                                                1000    1100 ........ .........................................  20020123           2002 1900000202   002
1000    1100 ........ .........................................20020123           2002 1900000203   002
1000    1100........ .........................................20020123           2002 1900000204   002
1000    1100........ .........................................20020123           2002 1900000205   002
now i try passing the doc_no (1900000XXX) and the fiscal year (2002) and company code to BKPF
the XBLNR field is blank. This document number sequence doesn't seem to be the accounting document number of the invoice coz that starts with 51XXXXXXXXX.
If i try passing the number with sequence 51XXX... to BKPF i get the invoice number there in the AWKEY field.
I am not sure what this sequence (19___) represents.
Sujai
Edited by: Sujai S on Nov 5, 2008 7:22 PM
Edited by: Sujai S on Nov 5, 2008 7:22 PM