idoc outbound to file with multiple records

Hi Friends,

I want to export multiple materials into one flat file per ale (idoc).

I know I can create îdocs per "bd10" and download into file per WE19,

but only several files not many idocs in one file.

Can somebody help me with this requirement.

Actually I want to extract material data per Idoc and import it later per LSMW.

Many Thanks.

Jimbob