When I use a module containing the Automation interfaces of objects in EXCEL generated by the Fortran Module Wizard I get $status error = "-2147319784" in Workbooks_Open. The program is running OK in WindowsNT/Excel97 but not in Windows2000/Excel2000 even if I generate a new module - why?. Error -2147319784 = "Old format or invalid type library". Help me, please!