SAP ABAP Class CL_HIER_REF_TREE (Reference Object: Structure) is using

• Class (18)
• Data Element (3)
• Table/Structure Field (40)
• Function Module (5)
• Message Class (2)
• Message Number (2)
• Class Method (10)
• Table (18)

#	Object Type	Object Name	Object Description	Note
1	Message Number	SQADB - 501	Internal: & error
2	Message Number	SQADB - 501	Internal: & error