Message Number list used by SAP ABAP Class CX_OO_CLASS_AMDP_NOT_SUPPORTED (AMDP not supported)
SAP ABAP Class CX_OO_CLASS_AMDP_NOT_SUPPORTED (AMDP not supported) is using
# Object Type Object Name Object Description Note
     
1 Message Number  OO - 420 Class &1 contains stored procedures which cannot be changed in SAP GUI