can you please tell me how to reslove the mapping issue?

HI Experts,

can you please tell me how to reslove this below mapping .

Each file to sequentially increase by one, beginning with “000001”.

Receiver side we need to populate this:Each file to sequentially increase by one, beginning with “000001”.(Target field=File Sequential Number)

Note:there is no sourse field this map

Sourse:IDOC

receiver:JMS

Thanks

Narendra