SAP ABAP Message Number OO - 420 (OO) is used by

• Class (7)
• Program (3)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Class	CL_OO_ABSTRACT_CLASS_TOOL Method: IF_OO_ACCESS_PERMISSION~ACCESS_FOR_MODIFY	Abstract Class Tool	SEOE	BASIS	SAP_BASIS
2	Class	CL_OO_CLASS_BUILDER Method: PROCESS_OP_DISP_OR_EDIT	Class Builder	SEOE	BASIS	SAP_BASIS
3	Class	CL_OO_CLASS_EDITOR Method: LOCK_CLASS_SOURCE	Editor For Complete Source Of A Class	SEO_SOURCE_BASED	BASIS	SAP_BASIS
4	Class	CL_OO_CLASS_EDITOR	Editor For Complete Source Of A Class	SEO_SOURCE_BASED	BASIS	SAP_BASIS
5	Class	CL_WB_CLEDITOR Method: LOCK_SECTION_SOURCE	Editors for Methods, Local Classes, Sections	SEOE	BASIS	SAP_BASIS
6	Class	CL_WB_CLEDITOR Method: LOCK_METHOD_SOURCE	Editors for Methods, Local Classes, Sections	SEOE	BASIS	SAP_BASIS
7	Class	CX_OO_CLASS_AMDP_NOT_SUPPORTED	AMDP not supported	SEO_SOURCE_BASED	BASIS	SAP_BASIS