List of bugs, oversights and unwanted features of N3.
Updated Aug. 9, 1999

Version 1.0 (old versioning scheme)
------------------------------------------------------------ 

The make_template command assumes the MINC header will be less than 16k.
This may cause evaluate_field to crash if template header has been
truncated.  
> changed to 32k in release 1.02

mv command is not registered in nu_evaluate script.
> fixed in release 1.02

Software doesn't compile on g++ versions that don't support -O3.

spline_smooth doesn't check that output file is writable until after
computing field.

evaluate_field may compute a different number of basis functions than 
spline_smooth did as a result of round off errors.

Version 1.1 (old versioning scheme)
------------------------------------------------------------ 
Path.c doesn't work correctly with the bash shell since it doesn't
have a PWD variable.
> fixed in release 1.04

On SGIs the compiler should be CC not DCC to take advantage of the
new formats.

Version 1.02
------------------------------------------------------------ 
volume_hist crashes if image min and max are same
> fixed in 1.02c

nu_correct fails rather mysteriously if the mask volume is empty
> fixed in 1.04

The code for bining in volume_hist may not handle the last bin correctly. 

The imp generation stage of nu_estimate_np_and_em may fail due to under
sampling of smooth volume.
> fixed in 1.03.   Note: this fix changes the results of the algorithm
slightly ( less than 0.3% for test suite ).

The intensity scaling of the output volume can be quite different than the
input.
> While this isn't a bug, an option has been added to nu_estimate_np_and_em to
correct for this in version 1.03.
> This option has been added to the nu_estimate/nu_correct scripts as of 1.04

Version 1.03
------------------------------------------------------------
A new verison of the test data is needed for the quantitative tests.
> fixed 1.04

float volumes created by evaluate_field may suffer round off problems
> fixed in 1.04
 
mincblur is required but not really necessary most of the time
> fixed in 1.04


Version 1.05
------------------------------------------------------------------------

If the input file and user supplied mask have the same filename except
for a _mask inserted before the extensions then on some system this
can result in the mask being empty.  The test suite will fail on
such systems (Linux 2.4 with XFS is one of them).
> Status: unresolved