[daip] Test of VBMRG

[Eric Greisen]

Jon Romney writes:
 > 
 > --  Use UVSRT to sort into BT order.
 > 
 > --  Use VBMRG to select unique records.
 > 
 > --  Use UVSRT to re-sort into TB order (for most purposes).
 > 
 > --  Run INDXR to re-index the final dataset.  (I also did
 > this after the first sort but it's not clear to me whether
 > that was necessary.)
 > 

I am suprised that INDXR worked on a BT data set and am certain it
produced a real mess.

Eric