From 96a3de7a434ce55f9a83f2f4918eb40efb60b4f4 Mon Sep 17 00:00:00 2001
From: mattijs <mattijs>
Date: Tue, 1 Jun 2010 14:35:55 +0100
Subject: [PATCH] ENH: work with processors with 0 cells. polyMesh::directions,
 checkMesh.

---
 .../utilities/mesh/manipulation/checkMesh/checkTopology.C    | 5 +++--
 src/OpenFOAM/meshes/polyMesh/polyMesh.C                      | 3 +++
 src/OpenFOAM/meshes/polyMesh/zones/faceZone/faceZone.C       | 5 ++---
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/applications/utilities/mesh/manipulation/checkMesh/checkTopology.C b/applications/utilities/mesh/manipulation/checkMesh/checkTopology.C
index f0aa4a0aaa..9e96eec03f 100644
--- a/applications/utilities/mesh/manipulation/checkMesh/checkTopology.C
+++ b/applications/utilities/mesh/manipulation/checkMesh/checkTopology.C
@@ -12,6 +12,7 @@ bool Foam::checkSync(const wordList& names)
     List<wordList> allNames(Pstream::nProcs());
     allNames[Pstream::myProcNo()] = names;
     Pstream::gatherList(allNames);
+    Pstream::scatterList(allNames);
 
     bool hasError = false;
 
@@ -72,8 +73,8 @@ Foam::label Foam::checkTopology
                 Info<< " ***FaceZone " << mesh.faceZones()[zoneI].name()
                     << " is not correctly synchronised"
                     << " across coupled boundaries."
-                    << " (coupled faces both"
-                    << " present in set but with opposite flipmap)" << endl;
+                    << " (coupled faces are either not both "
+                    << " present in set or have same flipmap)" << endl;
                 noFailedChecks++;
             }
         }
diff --git a/src/OpenFOAM/meshes/polyMesh/polyMesh.C b/src/OpenFOAM/meshes/polyMesh/polyMesh.C
index d0b3a7fa66..0ed5f56200 100644
--- a/src/OpenFOAM/meshes/polyMesh/polyMesh.C
+++ b/src/OpenFOAM/meshes/polyMesh/polyMesh.C
@@ -85,6 +85,9 @@ void Foam::polyMesh::calcDirections() const
         }
     }
 
+    reduce(nEmptyPatches, maxOp<label>());
+    reduce(nWedgePatches, maxOp<label>());
+
     if (nEmptyPatches)
     {
         reduce(emptyDirVec, sumOp<vector>());
diff --git a/src/OpenFOAM/meshes/polyMesh/zones/faceZone/faceZone.C b/src/OpenFOAM/meshes/polyMesh/zones/faceZone/faceZone.C
index ddda6efaf9..cfc23d06b3 100644
--- a/src/OpenFOAM/meshes/polyMesh/zones/faceZone/faceZone.C
+++ b/src/OpenFOAM/meshes/polyMesh/zones/faceZone/faceZone.C
@@ -498,10 +498,9 @@ bool Foam::faceZone::checkParallelSync(const bool report) const
                         break;
                     }
                 }
-
-                // Flip state should be opposite.
-                if (myZoneFlip[bFaceI] == neiZoneFlip[bFaceI])
+                else if (myZoneFlip[bFaceI] == neiZoneFlip[bFaceI])
                 {
+                    // Flip state should be opposite.
                     hasError = true;
 
                     if (report)