SAP ABAP Program LIWO1I00 (Screen Module for Reference Object) is using

• Class (1)
• Table/Structure Field (25)
• Function Module (2)
• Message Class (2)
• Message Number (4)
• Class Method (1)
• Table (4)

#	Object Type	Object Name	Object Description	Note
1	Message Class	IM	Maintenance notifications
2	Message Class	IP	Messages for preventive maintenance