Index: /issm/trunk-jpl/src/m/classes/inversion.m
===================================================================
--- /issm/trunk-jpl/src/m/classes/inversion.m	(revision 15430)
+++ /issm/trunk-jpl/src/m/classes/inversion.m	(revision 15431)
@@ -35,4 +35,5 @@
 						disp('converting taoinversion to inversion');
 						in=varargin{1};
+						obj=inversion();
 						obj.iscontrol                   = in.iscontrol;
 						obj.tao                         = 1;
@@ -54,4 +55,8 @@
 						obj.vel_obs                     = in.vel_obs;
 						obj.thickness_obs               = in.thickness_obs;
+					elseif isa(varargin{1},'inversion'),
+						obj = varargin{1};
+					else
+						error('constructor not supported');
 					end
 				otherwise