Index: mttroot/mtt/doc/mtt.texi
==================================================================
--- mttroot/mtt/doc/mtt.texi
+++ mttroot/mtt/doc/mtt.texi
@@ -14,10 +14,13 @@
 @comment %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 @comment  Version control history
 @comment %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 @comment  $Id$
 @comment  $Log$
+@comment  Revision 1.24  2004/08/13 01:39:24  geraint
+@comment  Fixed variable names in diy makefile example (again)
+@comment
 @comment  Revision 1.23  2004/08/11 08:24:28  geraint
 @comment  Replaced "gnuplot view" with "odeso gnuplot" in examples.
 @comment
 @comment  Revision 1.21  2004/07/23 11:05:26  geraint
 @comment  Updated Reduce URL: http://www.reduce-algebra.com
@@ -3863,10 +3866,16 @@
 @item the same for connected ports when both ports have defined units.
 @end itemize
 No checks are done if one or both ends of a bond are not connected to a
 port with defined units.
 
+The word ``none'' can be specified in place of a unit to prevent
+@strong{MTT} from checking the corresponding effort or flow while
+still checking the units of the other variable, if it is specified.
+This can be used to force checking of either the effort or flow on 
+signal bonds or in pseudo-bond graphs where the domain of the two
+variables may not be identical.
 
 
 @node Interface Control Definition, Aliases, Units declarations, Labels (lbl)
 @comment  node-name,  next,  previous,  up
 @subsection Interface Control Definition
@@ -4693,10 +4702,13 @@
 # %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 # %% Version control history
 # %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 # %% $Id$
 # %% $Log$
+# %% Revision 1.24  2004/08/13 01:39:24  geraint
+# %% Fixed variable names in diy makefile example (again)
+# %%
 # %% Revision 1.23  2004/08/11 08:24:28  geraint
 # %% Replaced "gnuplot view" with "odeso gnuplot" in examples.
 # %%
 # %% Revision 1.21  2004/07/23 11:05:26  geraint
 # %% Updated Reduce URL: http://www.reduce-algebra.com