MIGO BADI -for posting errors while creating a GR

Hi,

I am trying to post errors while creating a goods receipt from MIGO T-Code.The errors should state inconsistency between line items of the multiple PO numbers.For this I am using a BADI Mb_check_line_badi.I am able to produce the errors for as single line item but cannot find a way to loop the rest line items for the MSEG table,as  IS_MSEG is  a structure and the BADI is called once per item.

So is there any other alternative?

Please suggest.