Index: /issm/trunk/src/m/classes/public/ismodelselfconsistent.m
===================================================================
--- /issm/trunk/src/m/classes/public/ismodelselfconsistent.m	(revision 2352)
+++ /issm/trunk/src/m/classes/public/ismodelselfconsistent.m	(revision 2353)
@@ -298,4 +298,5 @@
 	fields={'vx_obs','vy_obs'};
 	testsize(md,fields,[md.numberofgrids 1]);
+	testnan(md,fields);
 
 	%DIRICHLET IF THICKNESS <= 0