Oki MC160 User Manual page 21

For details on the installation of the drivers for Windows and Macin-
tosh, refer to the Installation CD.
Windows TWAIN driver does not correspond to 64-bit applications
though it corresponds to 32-bit applications on 64-bit OS. For exam-
ple, it will work in a 32-bit application running on a Windows 64-bit
operating system but it will not work in a 64-bit application.
Getting Acquainted with Your Machine 1-11