NRNOC versions from (1993/07/09) to (1994/02/22) have an error in
nrnoc/SRC/vclmp.mod which gives wrong results for slow clamps.  The
clamp worked correctly for the default electrical parameters.

If running openlook you should set the following two attributes in
$NEURONHOME/lib/nrn.defaults
	*dismiss_button: off
	*use_transient_windows: on
Reverse these two attributes if using other window managers.
The graphical interface works only when one can easily resize, move, and
dismiss windows and each window has a title bar.
Openlook does this very well using transient windows and
in addition all windows disappear and reappear when the print window manager
is iconified. Some other window managers do not show a window bar
and disallow moving and resizing of transient windows.
If your window manager does not have these features for transient windows
there are two attributes located in $NEURONHOME/lib/nrn.defaults which will
help. For very easy dismissing of windows you can add a dismiss button to
each window by setting
*dismiss_button: on
alternatively you can invoke the program with the command line option
	-dismissbutton
To ensure that you can resize and move windows and have a title bar you can
set the attribute
*use_transient_windows: no
which causes toplevel windows to be used instead. Unfortunately, when the
print window manager is iconified, all other windows have there own icons
instead of being treated as a single group.

Saving widgets containing a graph that are part of a larger oc object
doesn't work very well without a lot of effort and sometimes doesn't
work at all.  eg the Grapher object almost saves correctly in the
context of a makegrapher() but the
window size and y-values don't restore. 

Dynamic view axes don't print in idraw files (although they
do in postscript)

Restored trays do not have labels and cannot be dissolved.

Missing features are too numerous to mention.