Index: ../trunk-jpl/src/c/Container/Observations.cpp
===================================================================
--- ../trunk-jpl/src/c/Container/Observations.cpp	(revision 14049)
+++ ../trunk-jpl/src/c/Container/Observations.cpp	(revision 14050)
@@ -451,7 +451,7 @@
 	this->ObservationList(&x,&y,&obs,&n_obs,x_interp,y_interp,radius,maxdata);
 
 	/*If we have less observations than mindata, return UNDEF*/
-	if(n_obs<mindata){
+	if(n_obs<mindata || n_obs<2){
 		prediction = UNDEF; 
 	}
 	else{