SAP ABAP Program LKKRUF01 (Include LKKRUF01) is using

• Table/Structure Field (37)
• Function Module (9)
• Message Class (1)
• Message Number (2)
• Table (11)

#	Object Type	Object Name	Object Description	Note
1	Message Number	KN - 301	No hierarchy nodes exist
2	Message Number	KN - 319	Empty characteristic above non-empty characteristic is not permitted