PLAT027

 Ideally (and a requirement for publication in Acta Crystallographica),
 the dataset should be essentially complete, as defined by 
 -diffrn-measured-fraction-theta-full (close to 1.0), up to 
 sin(theta)/lambda = 0.6 (i.e. 25.24 degrees MoKa).       
 The three major causes of incomplete data sets are:
 1 - A missing cusp of data due to data collection by rotation around
     the spindle axis only (standard on some image-plate systems).
     Cure: collect an additional data set after remounting the crystal.
 2 - The DENZO image processing package has problems with certain strong
     reflections. They are often excluded from the data set.
     Cure: Add an additional scan at lower power setting in order to
     include strong low order reflections.
 3 - Incomplete scans.