Multiple IDocs...But the same type To One Flat File

Hello All,

Sender SAP IDOC - (Multiple IDocs but same type)

The receiver a File

sends 1 file containing invoices and credit notes sold to xxxx.

This file is made of multiple blocks, each block being formatted by different record types :

-

Block1 - rec-type 1 = Header record / Start of a block (1 per block)

- rec-type 2 = Invoice Detail record ( N per block)

- rec-type 3 = Credit Note record (N per block)

- rec-type 4 = End of block (1 per block)

-

Any suggessions....How we can achieve this XI.

Thanks in Advance,

SV