Index: ../trunk-jpl/src/c/cores/bmb_core.cpp
===================================================================
--- ../trunk-jpl/src/c/cores/bmb_core.cpp	(revision 27022)
+++ ../trunk-jpl/src/c/cores/bmb_core.cpp	(revision 27023)
@@ -35,7 +35,9 @@
 	/*Call module now*/
 	FloatingiceMeltingRatex(femmodel);
 
-	/*Extrude basal melt*/
-	femmodel->parameters->SetParam(BasalforcingsFloatingiceMeltingRateEnum,InputToExtrudeEnum);
-	extrudefrombase_core(femmodel);
+	/*Extrude basal melt if not default melting rate (which may be a transient input that can't be extruded)*/
+	if(basalforcing_model!=FloatingMeltRateEnum){
+		femmodel->parameters->SetParam(BasalforcingsFloatingiceMeltingRateEnum,InputToExtrudeEnum);
+		extrudefrombase_core(femmodel);
+	}
 }