SAP ABAP Message Number CY - 520 (CY) is used by

• Function Module (2)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Function Module	CY01_INT_INTERFACE_PERIOD	Internal interface between period display and resource planning system	CY01	APPL	SAP_APPL
2	Function Module	CY01_INT_INTERFACE_TIMEBAR	Internal interface between planning table and resource planning system	CY01	APPL	SAP_APPL