Index: /issm/trunk-jpl/src/m/plot/processmesh.m
===================================================================
--- /issm/trunk-jpl/src/m/plot/processmesh.m	(revision 17576)
+++ /issm/trunk-jpl/src/m/plot/processmesh.m	(revision 17577)
@@ -32,13 +32,12 @@
 end
 
-z_field=getfieldvalue(options,'z',md.mesh.z);
-if ischar(z_field),
-	z=md.(z_field);
-elseif isnumeric(z_field),
-	z=z_field;
-elseif isprop(md.mesh,'z'),
+if isprop(md.mesh,'z'),
 	z=md.mesh.z;
 else
 	z=zeros(size(x));
+end
+z=getfieldvalue(options,'z',z);
+if ischar(z_field),
+	z=md.(z);
 end