harenber wrote: > fixme:ntdll:server_ioctl_file Unsupported ioctl 1b0064 (device=1b access=0 func=19 method=0) That is IOCTL_SERIAL_SET_HANDFLOW and appears to be implemented in Wine for serial port devices. Either Wine has some logic problem and thinks it's not a serial port (but a file). Or program does something stupid. Martin Gregorie wrote: > According to 'man ioctl_list' function 19 is associated with floppy disk drives in the Linux kernel. Windows' ioctl codes have nothing to do with Linux's ioctl codes.