Index: /issm/trunk-jpl/src/c/modules/InterpFromMeshToMesh2dx/InterpFromMeshToMesh2dx.cpp
===================================================================
--- /issm/trunk-jpl/src/c/modules/InterpFromMeshToMesh2dx/InterpFromMeshToMesh2dx.cpp	(revision 19467)
+++ /issm/trunk-jpl/src/c/modules/InterpFromMeshToMesh2dx/InterpFromMeshToMesh2dx.cpp	(revision 19468)
@@ -137,5 +137,7 @@
 			/*If we fall outside of the convex or outside of the mesh, return NaN*/
 			if(tb.det<0 || reft[it]<0){
-				data_interp[i*N_data+j]=-9999;
+				for (j=0;j<N_data;j++){
+					data_interp[i*N_data+j]=NAN;
+				}
 			}
 			else{