Index: /issm/trunk/src/m/model/mesh/rifts/meshprocessrifts.m
===================================================================
--- /issm/trunk/src/m/model/mesh/rifts/meshprocessrifts.m	(revision 9615)
+++ /issm/trunk/src/m/model/mesh/rifts/meshprocessrifts.m	(revision 9616)
@@ -26,4 +26,7 @@
 %Call MEX file
 [md.elements,md.x,md.y,md.segments,md.segmentmarkers,md.rifts]=TriMeshProcessRifts(md.elements,md.x,md.y,md.segments,md.segmentmarkers);
+if ~isstruct(md.rifts),
+	error('TriMeshProcessRifts did not find any rift');
+end
 
 %Fill in rest of fields: