Single IDoc to Create multiple Files based on the Store numbers

Hi,

I have a requirement in which I need to create multiple files from a single IDoc based on the store numbers (file name should contain respective store numbers). Like one store number will come from SAP and I need to fetch multiple store numbers linked to that incoming store number through RFC lookups and place the similar content to different files with respective store numbers.

One customize table is maintained in which SAP store number mapped to different store numbers as per business requirement.

e.g store number S001 is mapped to A001,B001,C001,D001 so when Idoc is triggered then 4 files(A001.txt,B001.txt,C001.txt and D001.txt) should be created with similar content.

How can I achieve above requirement ?

Thanks

Sarojkanta