Index: /issm/trunk-jpl/src/m/extrusion/project2d.py
===================================================================
--- /issm/trunk-jpl/src/m/extrusion/project2d.py	(revision 24671)
+++ /issm/trunk-jpl/src/m/extrusion/project2d.py	(revision 24672)
@@ -40,5 +40,5 @@
         projection_value = value[(layer - 1) * md3d.mesh.numberofvertices2d:layer * md3d.mesh.numberofvertices2d]
     elif value.shape[0] == md3d.mesh.numberofvertices + 1:
-        projection_value = [value[(layer - 1) * md3d.mesh.numberofvertices2d:layer * md3d.mesh.numberofvertices2d], value[-1]]
+        projection_value = np.vstack((value[(layer - 1) * md3d.mesh.numberofvertices2d:layer * md3d.mesh.numberofvertices2d], value[-1]))
     else:
         projection_value = value[(layer - 1) * md3d.mesh.numberofelements2d:layer * md3d.mesh.numberofelements2d]