Message Number list used by SAP ABAP Class CL_IBO_INBOX_SUBSTITUTE (inbox substitution)
SAP ABAP Class CL_IBO_INBOX_SUBSTITUTE (inbox substitution) is using
# Object Type Object Name Object Description Note
     
1 Message Number  IBO_INBOX_FEEDER - 017 A rule already exists for assignee &1
2 Message Number  IBO_INBOX_FEEDER - 018 End date must be &1 or later
3 Message Number  IBO_WF_INBOX - 023 Unable to delete substitute &1