Index: ../trunk-jpl/src/m/classes/model.m
===================================================================
--- ../trunk-jpl/src/m/classes/model.m	(revision 19049)
+++ ../trunk-jpl/src/m/classes/model.m	(revision 19050)
@@ -764,10 +764,10 @@
 			md.surfaceforcings = extrude(md.surfaceforcings,md);
 			md.initialization = extrude(md.initialization,md);
 
-			md.flowequation.extrude(md);
+			md.flowequation=md.flowequation.extrude(md);
 			md.stressbalance=extrude(md.stressbalance,md);
-			md.thermal.extrude(md);
-			md.masstransport.extrude(md);
+			md.thermal=md.thermal.extrude(md);
+			md.masstransport=md.masstransport.extrude(md);
 			md.calving=extrude(md.calving,md);
 			md.hydrology = extrude(md.hydrology,md);
 
