From a5858393c68341141002bfe997d390542c123667 Mon Sep 17 00:00:00 2001
From: Tor Harald Sandve <tor.harald.sandve@iris.no>
Date: Tue, 23 May 2017 15:48:35 +0200
Subject: [PATCH] Avoid negative indicies in minPvFillNtg_

---
 ebos/ecltransmissibility.hh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ebos/ecltransmissibility.hh b/ebos/ecltransmissibility.hh
index e5618be47..7d89acbca 100644
--- a/ebos/ecltransmissibility.hh
+++ b/ebos/ecltransmissibility.hh
@@ -429,6 +429,10 @@ private:
 
             // use the original ntg values if the cell above has porv > minPVvalue.
             int cartesianCellIdxAbove = cartesianCellIdx - nxny;
+
+            if (cartesianCellIdxAbove < 0)
+                continue;
+
             if (porv[cartesianCellIdxAbove] > eclGrid.getMinpvValue() ){
                 averageNtg[cartesianCellIdx] = ntg[cartesianCellIdx];
                 continue;