Hello Nitin,
Where exactly you are adding your field?
We have below Inlcudes but for different purposes and Exit is different for all these:
KAEP_COAC
Field List: Line Item Report for Actual Costs
CI_RKPOS
Order type for CO reporting(customer defined)
CI_AUFK
Internal Order Customer Include
Add your field CI_RKPOS and add your logic to user exit EXIT_SAPLKAEP_001.
Few more Exit used to Enhance the same Transaction code.
EXIT_SAPLKMA6_001
EXIT_SAPLKMA6_002
Regards,
Sujeet