diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/Allclean b/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/Allclean
new file mode 100755
index 0000000000000000000000000000000000000000..a76e8dff53cb6dd7c244c39473ce569b56389e1d
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/Allclean
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+# Source tutorial clean functions
+. $WM_PROJECT_DIR/bin/tools/CleanFunctions
+
+cleanCase
+rm -rf VTK
+rm -rf constant/cellToRegion constant/polyMesh/sets
+rm -rf 0/bottomAir
+rm -rf 0/topAir
+rm -rf 0/heater
+rm -rf 0/leftSolid
+rm -rf 0/rightSolid
+rm -f 0/cellToRegion
+rm -rf constant/bottomAir/polyMesh
+rm -rf constant/topAir/polyMesh
+rm -rf constant/heater/polyMesh
+rm -rf constant/leftSolid/polyMesh
+rm -rf constant/rightSolid/polyMesh
+
+# -----------------------------------------------------------------------------
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/Allrun b/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/Allrun
index 56cc2a348ccf26e36ab8bb0e017ceb1f25ea363e..231c46e6ec332c7aaed3b9e8d7c63cf01f835571 100755
--- a/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/Allrun
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/Allrun
@@ -11,7 +11,7 @@ runApplication setSet -batch makeCellSets.setSet
 rm -f constant/polyMesh/sets/*_old
 
 runApplication setsToZones -noFlipMap
-runApplication splitMeshRegions -cellZones
+runApplication splitMeshRegions -cellZones -overwrite
 
 # remove fluid fields from solid regions (important for post-processing)
 for i in heater leftSolid rightSolid
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/Allclean b/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/Allclean
index 6771f180d8824b2b5187c97d9dca6282e744cbf8..a76e8dff53cb6dd7c244c39473ce569b56389e1d 100755
--- a/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/Allclean
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/Allclean
@@ -11,6 +11,7 @@ rm -rf 0/topAir
 rm -rf 0/heater
 rm -rf 0/leftSolid
 rm -rf 0/rightSolid
+rm -f 0/cellToRegion
 rm -rf constant/bottomAir/polyMesh
 rm -rf constant/topAir/polyMesh
 rm -rf constant/heater/polyMesh