anchor.diff:  
   ! Transfer the bridge element string amplitudes to bridgeY:
     do i=1,3
  -    bridgeY(i,t) = y(bridgeElement-2+i,t)
  +    bridgeY(i,t) = y(bridgeElement-2+i,localt)
     end do
   
     y(:,localt-2) = y(:,localt-1)
  
positive.code: 
  ! Transfer the bridge element string amplitudes to bridgeY:
    do i=1,3
      bridgeY(i,t) = y(bridgeElement-2+i,t)
    end do
  
    y(:,localt-2) = y(:,localt-1)
  
negative.code: 
  ! Transfer the bridge element string amplitudes to bridgeY:
    do i=1,3
      bridgeY(i,t) = y(bridgeElement-2+i,localt)
    end do
  
    y(:,localt-2) = y(:,localt-1)
  