Do you mean it won't play if BIAB inserted as a "Hi-Q" track/part/instrument
Or do you mean you, external and apart from BIAB, you cannot make SampleTank play that sound even if you manually inserted it into a Sampletank part ?
Don't have any MIDI controllers hooked up to the laptop in question, but the other night I did open SampleTank itself and loaded that same missing Grand Piano into it and could not play it with the mouse on the visual keyboard. Tried a few of the instruments that do play inside of BB and they would not play with the virtual keyboard either.
Not too concerned about it, really, I got stuff here that blows the SampleTanks sounds into the river.
I just like to tinker with broken things.
--Mac