Index: /issm/trunk-jpl/src/m/classes/masstransport.py
===================================================================
--- /issm/trunk-jpl/src/m/classes/masstransport.py	(revision 15881)
+++ /issm/trunk-jpl/src/m/classes/masstransport.py	(revision 15882)
@@ -61,5 +61,5 @@
 
 		md = checkfield(md,'masstransport.spcthickness','forcing',1)
-		md = checkfield(md,'masstransport.isfreesurface','values',[0 1])
+		md = checkfield(md,'masstransport.isfreesurface','values',[0,1])
 		md = checkfield(md,'masstransport.hydrostatic_adjustment','values',['Absolute','Incremental'])
 		md = checkfield(md,'masstransport.stabilization','values',[0,1,2,3])