Index: /issm/trunk-jpl/src/c/Container/Observations.cpp
===================================================================
--- /issm/trunk-jpl/src/c/Container/Observations.cpp	(revision 14049)
+++ /issm/trunk-jpl/src/c/Container/Observations.cpp	(revision 14050)
@@ -452,5 +452,5 @@
 
 	/*If we have less observations than mindata, return UNDEF*/
-	if(n_obs<mindata){
+	if(n_obs<mindata || n_obs<2){
 		prediction = UNDEF; 
 	}