Hi,
This BADI won't be helpful for your need. As note 883122 specifies:
"
FMRP_RFFMEPGAX_EXIT
Using this BAdI the customer can process the lines in the Document Journal. The data shown in the standard is basically the FMIOI content. The BAdI gives the possibility to modify the display of this data.
Implementation FM_EF_HIST_REP_SPAIN enables the user to use four additional columns in the document journal. This additional fields are "open amount" (in both local and document currency) and "amount left" (again in both local and document currency). To be able to use those columns the customer must add the structure "IFMEFHIST" into the customer include of the structure "IFMREPGAX" (structure used in the document journal report). The open amount field is used to display the actual non-consumed amount in every earmarked fund document line. The amount left is used to display the part of a line amount that is not passed to the next year during the carryforward process."
The report in question is reading FMIFIIT/FMIO tables and cannot display fields from FI tables, e.g. BSEG.
Regards,
Eli