Message Class list used by SAP ABAP Function Module ISU_INTERNAL_INSTALLATION_PREP (internal preparation of an installation)
SAP ABAP Function Module ISU_INTERNAL_INSTALLATION_PREP (internal preparation of an installation) is using
# Object Type Object Name Object Description Note
     
1 Message Class  AH IS-U billing (master data)
2 Message Class  E9 General IS-U Error Messages
3 Message Class  EL IS-U meter reading data processing