I talked with the ANT team about this today, and they explained that if an ANT sensor is already connected natively you cannot open a generic channel to that same device by design. I don't really have any more detail about why this decision was made. I think the approach we'd want to take is make native data available to CIQ apps, since it's already got a channel to the device through the native interface (which MoxyRoger has already asked for).