From c805ed359faad5ad5bb850aed1c648fd9fc94a13 Mon Sep 17 00:00:00 2001
From: mattijs <mattijs>
Date: Wed, 1 Jun 2011 18:07:00 +0100
Subject: [PATCH] ENH: redistributeMeshPar: better error message

---
 .../decomposePar/domainDecomposition.C                 | 10 ++++++++++
 .../redistributeMeshPar/redistributeMeshPar.C          | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/applications/utilities/parallelProcessing/decomposePar/domainDecomposition.C b/applications/utilities/parallelProcessing/decomposePar/domainDecomposition.C
index 4882c118a0..36a6ad2eb4 100644
--- a/applications/utilities/parallelProcessing/decomposePar/domainDecomposition.C
+++ b/applications/utilities/parallelProcessing/decomposePar/domainDecomposition.C
@@ -860,6 +860,16 @@ bool Foam::domainDecomposition::writeDecomposition()
     scalar avgProcPatches = scalar(totProcPatches)/nProcs_;
     scalar avgProcFaces = scalar(totProcFaces)/nProcs_;
 
+    // In case of all faces on one processor. Just to avoid division by 0.
+    if (totProcPatches == 0)
+    {
+        avgProcPatches = 1;
+    }
+    if (totProcFaces == 0)
+    {
+        avgProcFaces = 1;
+    }
+
     Info<< nl
         << "Number of processor faces = " << totProcFaces/2 << nl
         << "Max number of cells = " << maxProcCells
diff --git a/applications/utilities/parallelProcessing/redistributeMeshPar/redistributeMeshPar.C b/applications/utilities/parallelProcessing/redistributeMeshPar/redistributeMeshPar.C
index 8812e78e64..509bff8898 100644
--- a/applications/utilities/parallelProcessing/redistributeMeshPar/redistributeMeshPar.C
+++ b/applications/utilities/parallelProcessing/redistributeMeshPar/redistributeMeshPar.C
@@ -475,6 +475,16 @@ void printMeshData(const polyMesh& mesh)
     scalar avgProcPatches = scalar(totProcPatches)/Pstream::nProcs();
     scalar avgProcFaces = scalar(totProcFaces)/Pstream::nProcs();
 
+    // In case of all faces on one processor. Just to avoid division by 0.
+    if (totProcPatches == 0)
+    {
+        avgProcPatches = 1;
+    }
+    if (totProcFaces == 0)
+    {
+        avgProcFaces = 1;
+    }
+
     Info<< nl
         << "Number of processor faces = " << totProcFaces/2 << nl
         << "Max number of cells = " << maxProcCells