SO IDOC inbound create SO with reference to INV or SO #

Hi all,

I have a situation where I will get the inbound SO IDOC, through IDOC_INPUT_ORDERS and create a sales order with reference to a invoice number or another sales order (eg: consignment pick up and consignment fill up).

Except modifying the standard formed BDC in the FM, by adding additional screen code into the BDC, is there any other way to do so?

(eg: assign value into certain field in IDOC? Using another IDOC FM?)

Please advice.

Thanks.

Best Regards,

JL