I opened a BiaB file created with version 2014 and received the error message in the subject.

The Piano, Strings and Soloist tracks (2nd, 5th, & 7th) do not play. When I open this project in Real Band, there is no audio for those tracks, except at the very end of the song where there is a hold.

In the Piano and Soloist tracks there are no VST/DX/Plugins.

In the Strings track on the Plugins Tab [SampleTank 2.x] is listed when I open the project. In the pop-up VST/DX/Plugins window, the first slot is empty though and displays <DX> None.

This is not happening with other 2014 BiaB projects. I tried creating a new instance of RT 1787 in Real Band on a new empty track, there is no audio generated except at that held note at the end of the song.

From Real Band:

****** Song Summary *************
Title: Untitled Song
File:Little Cabin 2015.SGU
Key=D , Tempo 88, Length (m:s)=3:34
No intro. 83 bar chorus, from bar 1 to bar 83. Repeat x1 chorus
No Melody
No Soloist track.
Song is saved with bar changes for Time signature,RealDrums Changes,
Style is _FPBTSSW.STY (2 Sw FgerpickGuitars Slow [85RS])
StringsCustom Synth is Hi-Q 001 01 Piano, Acoustic, Grand SampleTank.tgs

RealTracks in song: 1190:Bass, Electric, ModernRnBRock Ev 065
RealTracks in song: 1787:Fiddle, Background Pop16ths Ev 085 (Outside)
RealTracks in song: 378:Guitar, Acoustic, Strumming DoubleTime Ev 088
RealTracks in song: 1787:Fiddle, Background Pop16ths Ev 085 (Outside)
RealTracks in song: 1760:Fiddle, Background Pop16ths Ev 085
RealTracks in song: 1604:Fiddle, Background Pop16ths Ev 110
RealDrums in Song: NashBrushBalDbKEv16^3-a: QuarterHat, TripletSnare , b: QuarterRide, Snare
*******************

Does that 'StringsCustom Synth' mean anything to you experts? Thanks for reading this and for any suggestions.

My songs are here:
https://soundcloud.com/scott-h-olson