TWAIN 16-BIT ONLY INSTALLATION ON WINDOWS 3.1/3.11 PLATFORMS (Without Win32s) Check that the following file is being installed. Check the version. If the version you are trying to install is later, overwrite the existing file. - TWAIN.DLL installed in the \WINDOWS directory File sharing must be installed for this version of the 16bit DSM to work. This means your install must enable SHARE.EXE or VSHARE.386. For Windows 3.1 systems, SHARE.EXE should be referenced in the AUTOEXEC.BAT file. Make certain it isn't a duplicate entry! For Windows for Workgroups 3.11 VSHARE.386 should be referenced in the SYSTEM.INI file. Check with Microsoft about the legal issues of shipping SHARE.EXE or VSHARE.386 with your program.