I have found that my USB sound or MIDI devices *must be connected and recognized by the Operating System BEFORE opening Band in a Box.

While some of the other audio programs I run will recognize a USB device when it is plugged in while the program is open and running, Band in a Box does things differently. Presumably this is because BBW.EXE does not write to the Windows Registry, enabling it to run standalone, but that's really just conjecture on my part.

So if you've been connecting the USB device *after* BiaB has been started, try closing BiaB down completely, then reconnect the device and then start BiaB up again and see if the error messages go away. They do in my experience with several other USB devices, but unfortunately I do not own a Lexicon to be able to test that here.

--Mac