Index: /issm/trunk-jpl/src/m/classes/mask.py
===================================================================
--- /issm/trunk-jpl/src/m/classes/mask.py	(revision 15600)
+++ /issm/trunk-jpl/src/m/classes/mask.py	(revision 15601)
@@ -50,5 +50,5 @@
 		md = checkfield(md,'mask.icelevelset'         ,'size',[md.mesh.numberofvertices])
 		isice=numpy.zeros(md.mesh.numberofvertices,int)
-		pos=npy.nonzero(md.mask.icelevelset>0)
+		pos=numpy.nonzero(md.mask.icelevelset>0)
 		isice[pos]=1
 		totallyicefree=(numpy.sum(isice[md.mesh.elements-1],axis=1)==0).astype(int)