Index: /issm/trunk-jpl/src/m/classes/m1qn3inversion.m
===================================================================
--- /issm/trunk-jpl/src/m/classes/m1qn3inversion.m	(revision 17967)
+++ /issm/trunk-jpl/src/m/classes/m1qn3inversion.m	(revision 17968)
@@ -87,5 +87,7 @@
 			else
 				md = checkfield(md,'fieldname','inversion.vx_obs','size',[md.mesh.numberofvertices 1],'NaN',1);
-				md = checkfield(md,'fieldname','inversion.vy_obs','size',[md.mesh.numberofvertices 1],'NaN',1);
+				if ~strcmp(domaintype(md.mesh),'2Dvertical'),
+					md = checkfield(md,'fieldname','inversion.vy_obs','size',[md.mesh.numberofvertices 1],'NaN',1);
+				end
 			end
 		end % }}}