SAP ABAP Program RFBNUM00 (Gaps in Document Number Assignment) is using

• Class (5)
• Data Element (1)
• Table/Structure Field (60)
• Function Module (9)
• Message Class (1)
• Message Number (6)
• Class Method (4)
• Table (10)

#	Object Type	Object Name	Object Description	Note
1	Message Class	FR	Messages for FI Reporting