From 75945b507fee1ecec2865a94355583b2914b9dff Mon Sep 17 00:00:00 2001
From: mattijs <mattijs@hunt.opencfd.co.uk>
Date: Tue, 23 Jun 2009 13:16:00 +0100
Subject: [PATCH] error check for zero cells

---
 .../utilities/mesh/conversion/gmshToFoam/gmshToFoam.C  | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/applications/utilities/mesh/conversion/gmshToFoam/gmshToFoam.C b/applications/utilities/mesh/conversion/gmshToFoam/gmshToFoam.C
index 68eb9c46cf..23aec54cd8 100644
--- a/applications/utilities/mesh/conversion/gmshToFoam/gmshToFoam.C
+++ b/applications/utilities/mesh/conversion/gmshToFoam/gmshToFoam.C
@@ -657,6 +657,16 @@ void readCells
     << "    tet  :" << nTet << endl
     << endl;
 
+    if (cells.size() == 0)
+    {
+        FatalErrorIn("readCells(..)")
+            << "No cells read from file " << inFile.name() << nl
+            << "Does your file specify any 3D elements (hex=" << MSHHEX
+            << ", prism=" << MSHPRISM << ", pyramid=" << MSHPYR
+            << ", tet=" << MSHTET << ")?" << nl
+            << "Perhaps you have not exported the 3D elements?"
+            << exit(FatalError);
+    }
 
     Info<< "CellZones:" << nl
         << "Zone\tSize" << endl;