Message Class list used by SAP ABAP Program RSIO0009 (OLTP Metadata Repository)
SAP ABAP Program RSIO0009 (OLTP Metadata Repository) is using
# Object Type Object Name Object Description Note
     
1 Message Class  AD Data Dictionary application messages
2 Message Class  R3 Service API messages
3 Message Class  R8 Messages from the meta data generation
4 Message Class  RJ BW Extractor Handling Message Class