Index: trunk/BNC/src/pppModel.cpp
===================================================================
--- trunk/BNC/src/pppModel.cpp	(revision 6107)
+++ trunk/BNC/src/pppModel.cpp	(revision 6108)
@@ -362,5 +362,5 @@
   if (h_km < 0.0) h_km = 0.0;
   if (h_km > 5.0) h_km = 5.0;
-  int    ii   = int(h_km + 1);
+  int    ii   = int(h_km + 1); if (ii > 5) ii = 5;
   double href = ii - 1;