SAP ABAP Message Number RRKEB - 020 (RRKEB) is used by

• Function Module (4)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Function Module	CONVERSION_EXIT_PERI6_INPUT	Conversion for Six-Digit Periods (for example, Month)	SBIW	BASIS	SAP_BASIS
2	Function Module	CONVERSION_EXIT_PERI6_OUTPUT	Conversion of Six-Digit Periods (for example, Month)	SBIW	BASIS	SAP_BASIS
3	Function Module	CONVERSION_EXIT_PERI7_INPUT	Conversion Exit: Periods/Fiscal Year to Internal Format YYYYPPP	SBIW	BASIS	SAP_BASIS
4	Function Module	CONVERSION_EXIT_PERI7_OUTPUT	Conversion Exit from Internal Format YYYYPPP to Periods/Fiscal Year	SBIW	BASIS	SAP_BASIS