Message Class list used by SAP ABAP Table IOHEADER (Database structure for order headers and items)
SAP ABAP Table IOHEADER (Database structure for order headers and items) is using
# Object Type Object Name Object Description Note
     
1 Message Class  GJ Joint Venture Accounting
2 Message Class  GJ Joint Venture Accounting
3 Message Class  GJ Joint Venture Accounting
4 Message Class  I0 Messages for PM tables