diff --git a/src/OpenFOAM/meshes/polyMesh/globalMeshData/globalIndexTemplates.C b/src/OpenFOAM/meshes/polyMesh/globalMeshData/globalIndexTemplates.C
index cda4eb0e072bd1be10a77ce5fa67d5b379eabe66..f8676ace535e82215da259f619b134bdd743f8d7 100644
--- a/src/OpenFOAM/meshes/polyMesh/globalMeshData/globalIndexTemplates.C
+++ b/src/OpenFOAM/meshes/polyMesh/globalMeshData/globalIndexTemplates.C
@@ -99,13 +99,12 @@ void Foam::globalIndex::gather
         allFld.resize_nocopy(off.last());
 
         // Assign my local data - respect offset information
-        // so that we can request 0 entries to be copied
+        // so that we can request 0 entries to be copied.
+        // Also handle the case where we have a slice of the full
+        // list.
 
-        SubList<Type> localSlot(allFld, off[1]-off[0], off[0]);
-        if (!localSlot.empty())
-        {
-            localSlot = fld;
-        }
+        SubList<Type>(allFld, off[1]-off[0], off[0]) =
+           SubList<Type>(fld, off[1]-off[0]);
 
         if
         (
diff --git a/tutorials/compressible/rhoSimpleFoam/squareBendLiq/Allrun b/tutorials/compressible/rhoSimpleFoam/squareBendLiq/Allrun
index 78d5debbe7f687177b9c06cd6b65b939d99f8820..088d3bc05812944922e5ae24e3bcb134ae6fcf5a 100755
--- a/tutorials/compressible/rhoSimpleFoam/squareBendLiq/Allrun
+++ b/tutorials/compressible/rhoSimpleFoam/squareBendLiq/Allrun
@@ -5,6 +5,28 @@ cd "${0%/*}" || exit                                # Run from this directory
 
 ./Allrun.pre
 
-runApplication $(getApplication)
+runApplication decomposePar
+
+#- Run without processorAgglomerator
+runParallel $(getApplication)
+
+#- Run with processorAgglomerator
+foamDictionary -entry solvers.p.processorAgglomerator -set 'masterCoarsest' system/fvSolution
+runParallel -s masterCoarsest $(getApplication)
+
+#- Run with processorAgglomerator
+foamDictionary -entry solvers.p.processorAgglomerator -set 'procFaces' system/fvSolution
+foamDictionary -entry solvers.p.nAgglomeratingCells -set 100 system/fvSolution
+runParallel -s procFaces $(getApplication)
+foamDictionary -entry solvers.p.nAgglomeratingCells -remove system/fvSolution
+
+#- Run with processorAgglomerator
+foamDictionary -entry solvers.p.processorAgglomerator -set 'eager' system/fvSolution
+runParallel -s eager $(getApplication)
+
+#- Run with processorAgglomerator
+foamDictionary -entry solvers.p.processorAgglomerator -set 'manual' system/fvSolution
+foamDictionary -entry solvers.p.processorAgglomeration -set '((9 ((0 1 2 3)(4 5 6))))' system/fvSolution
+runParallel -s manual $(getApplication)
 
 #------------------------------------------------------------------------------
diff --git a/tutorials/compressible/rhoSimpleFoam/squareBendLiq/Allrun-parallel b/tutorials/compressible/rhoSimpleFoam/squareBendLiq/Allrun-seq
similarity index 85%
rename from tutorials/compressible/rhoSimpleFoam/squareBendLiq/Allrun-parallel
rename to tutorials/compressible/rhoSimpleFoam/squareBendLiq/Allrun-seq
index f9aa96400d93c788a4829dbd6f6f60b7f91bae7d..78d5debbe7f687177b9c06cd6b65b939d99f8820 100755
--- a/tutorials/compressible/rhoSimpleFoam/squareBendLiq/Allrun-parallel
+++ b/tutorials/compressible/rhoSimpleFoam/squareBendLiq/Allrun-seq
@@ -5,8 +5,6 @@ cd "${0%/*}" || exit                                # Run from this directory
 
 ./Allrun.pre
 
-runApplication decomposePar
-
-runParallel $(getApplication)
+runApplication $(getApplication)
 
 #------------------------------------------------------------------------------
diff --git a/tutorials/compressible/rhoSimpleFoam/squareBendLiq/system/controlDict b/tutorials/compressible/rhoSimpleFoam/squareBendLiq/system/controlDict
index 49788d6501a321346318f0d039ec880fd8f0d501..9539c8b0a0e3032137151afdbd601c328cef85ad 100644
--- a/tutorials/compressible/rhoSimpleFoam/squareBendLiq/system/controlDict
+++ b/tutorials/compressible/rhoSimpleFoam/squareBendLiq/system/controlDict
@@ -14,6 +14,11 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
+DebugSwitches
+{
+    GAMGAgglomeration   1;
+}
+
 application     rhoSimpleFoam;
 
 startFrom       startTime;