diff --git a/src/GridGenerator/grid/Field.cu b/src/GridGenerator/grid/Field.cu
index b54686803b59be6e5fd26c1e203a6cd8b10f7df7..27914835602a3c92a1d5a5c04cef730d11fdb0de 100644
--- a/src/GridGenerator/grid/Field.cu
+++ b/src/GridGenerator/grid/Field.cu
@@ -91,6 +91,11 @@ HOSTDEVICE bool Field::isStopperOverlapGrid(uint index) const
     return field[index] == STOPPER_OVERLAP_GRID;
 }
 
+HOSTDEVICE bool Field::isStopper(uint index) const
+{
+    return isStopperEndOfGrid(index) || isStopperOverlapGrid(index);
+}
+
 HOSTDEVICE bool Field::isQ(uint index) const
 {
     return field[index] == Q;
diff --git a/src/GridGenerator/grid/Field.h b/src/GridGenerator/grid/Field.h
index c79b29fe1e6d7438699b94b0903cb195d9d7c5d6..3b56e1b4deaf89d8b5e2685a7f9f056160403ca5 100644
--- a/src/GridGenerator/grid/Field.h
+++ b/src/GridGenerator/grid/Field.h
@@ -28,6 +28,7 @@ public:
     HOSTDEVICE bool isInvalid(uint index) const;
     HOSTDEVICE bool isStopperEndOfGrid(uint index) const;
     HOSTDEVICE bool isStopperOverlapGrid(uint index) const;
+    HOSTDEVICE bool isStopper(uint index) const;
     HOSTDEVICE bool isOutOfGrid(uint index) const;
 
     HOSTDEVICE void setFieldEntry(uint index, char val);
diff --git a/src/GridGenerator/grid/GridImp.cu b/src/GridGenerator/grid/GridImp.cu
index ebf9d9c20270521ddd136fec95a9108605c58cd9..022ac9a121daca28b989531ed12bd768c511769a 100644
--- a/src/GridGenerator/grid/GridImp.cu
+++ b/src/GridGenerator/grid/GridImp.cu
@@ -309,7 +309,7 @@ HOSTDEVICE void GridImp::setNeighborIndices(uint index)
     neighborIndexY[index] = -1;
     neighborIndexZ[index] = -1;
 
-    if (this->field.isStopperEndOfGrid(index) || this->field.isStopperOverlapGrid(index))
+    if (this->field.isStopper(index))
     {
         this->setStopperNeighborCoords(index);
         return;
@@ -336,13 +336,13 @@ HOSTDEVICE void GridImp::setStopperNeighborCoords(uint index)
     real x, y, z;
     this->transIndexToCoords(index, x, y, z);
 
-    if (CudaMath::lessEqual(x + delta, endX) && (this->field.isStopperEndOfGrid(this->transCoordToIndex(x + delta, y, z)) || this->field.isFluid(this->transCoordToIndex(x + delta, y, z))))
+    if (CudaMath::lessEqual(x + delta, endX) && (this->field.isStopper(this->transCoordToIndex(x + delta, y, z)) || this->field.isFluid(this->transCoordToIndex(x + delta, y, z))))
         neighborIndexX[index] = getSparseIndex(x + delta, y, z);
 
-    if (CudaMath::lessEqual(y + delta, endY) && (this->field.isStopperEndOfGrid(this->transCoordToIndex(x, y + delta, z)) || this->field.isFluid(this->transCoordToIndex(x, y + delta, z))))
+    if (CudaMath::lessEqual(y + delta, endY) && (this->field.isStopper(this->transCoordToIndex(x, y + delta, z)) || this->field.isFluid(this->transCoordToIndex(x, y + delta, z))))
         neighborIndexY[index] = getSparseIndex(x, y + delta, z);
 
-    if (CudaMath::lessEqual(z + delta, endZ) && (this->field.isStopperEndOfGrid(this->transCoordToIndex(x, y, z + delta)) || this->field.isFluid(this->transCoordToIndex(x, y, z + delta))))
+    if (CudaMath::lessEqual(z + delta, endZ) && (this->field.isStopper(this->transCoordToIndex(x, y, z + delta)) || this->field.isFluid(this->transCoordToIndex(x, y, z + delta))))
         neighborIndexZ[index] = getSparseIndex(x, y, z + delta);
 }
 
@@ -374,7 +374,7 @@ HOSTDEVICE real GridImp::getFirstFluidNode(real coords[3], int direction, real s
 {
     coords[direction] = startCoord;
     int index = this->transCoordToIndex(coords[0], coords[1], coords[2]);
-    while (field.isOutOfGrid(index))
+    while (!field.isFluid(index))
     {
         coords[direction] += delta;
         index = this->transCoordToIndex(coords[0], coords[1], coords[2]);
diff --git a/src/GridGenerator/grid/GridInterface.cu b/src/GridGenerator/grid/GridInterface.cu
index 1953cf1a13d5bfd2cf9330fa585d11d276c8f7c1..62be00bcd691b0a5fe87c25c9e723aaad4eb37ef 100644
--- a/src/GridGenerator/grid/GridInterface.cu
+++ b/src/GridGenerator/grid/GridInterface.cu
@@ -32,7 +32,6 @@ void GridInterface::findInterfaceCF(const uint& indexOnCoarseGrid, GridImp* coar
     real x, y, z;
     coarseGrid->transIndexToCoords(indexOnCoarseGrid, x, y, z);
 
-
     for(const auto dir : coarseGrid->distribution)
     {
         const bool isFineGridNeighborFluid = isNeighborFineFluid(x + dir[0] * coarseGrid->getDelta(), y + dir[1] * coarseGrid->getDelta(), z + dir[2] * coarseGrid->getDelta(), coarseGrid, fineGrid);
diff --git a/src/GridGenerator/io/SimulationFileWriter/SimulationFileWriter.cpp b/src/GridGenerator/io/SimulationFileWriter/SimulationFileWriter.cpp
index 28357dbdf3add9110138870f13ad30d78625c7c3..95d08416d835a9e9b50e62ca16a0902ea8b2fb0b 100644
--- a/src/GridGenerator/io/SimulationFileWriter/SimulationFileWriter.cpp
+++ b/src/GridGenerator/io/SimulationFileWriter/SimulationFileWriter.cpp
@@ -177,7 +177,7 @@ void SimulationFileWriter::writeCoordsNeighborsGeo(SPtr<GridBuilder> builder, in
     if (grid->getSparseIndex(index) == -1)
         return;
 
-    int type = grid->getFieldEntry(index) == SOLID ? 16 : 19;
+    int type = grid->getFieldEntry(index) == FLUID ? 19 : 16;
     real x, y, z;
     grid->transIndexToCoords(index, x, y, z);
 
diff --git a/src/VirtualFluids_GPU/LBM/Simulation.cpp b/src/VirtualFluids_GPU/LBM/Simulation.cpp
index 8e894308ab1a4fad838f3b45da7208ed85390ee4..e303f74dd16870ea5d85ea959b6a39eb070abb5e 100644
--- a/src/VirtualFluids_GPU/LBM/Simulation.cpp
+++ b/src/VirtualFluids_GPU/LBM/Simulation.cpp
@@ -1684,7 +1684,7 @@ void Simulation::run()
 							    //para->getParD(0)->offFC);
            // getLastCudaError("ScaleFC_Fix_comp_27 execution failed");
             ////////////////////////////////////////////////////////////////////////////
-            /*ScaleFC_RhoSq_comp_27(para->getParD(0)->d0SP.f[0],      para->getParD(1)->d0SP.f[0], 
+            ScaleFC_RhoSq_comp_27(para->getParD(0)->d0SP.f[0],      para->getParD(1)->d0SP.f[0], 
 							      para->getParD(0)->neighborX_SP,   para->getParD(0)->neighborY_SP,    para->getParD(0)->neighborZ_SP, 
 							      para->getParD(1)->neighborX_SP,   para->getParD(1)->neighborY_SP,    para->getParD(1)->neighborZ_SP, 
 							      para->getParD(0)->size_Mat_SP,    para->getParD(1)->size_Mat_SP,     para->getParD(0)->evenOrOdd,
@@ -1693,7 +1693,7 @@ void Simulation::run()
 							      para->getParD(0)->vis,            para->getParD(0)->nx,              para->getParD(0)->ny, 
 							      para->getParD(1)->nx,             para->getParD(1)->ny,              para->getParD(0)->numberofthreads,
 							      para->getParD(0)->offFC);
-            getLastCudaError("ScaleFC_RhoSq_comp_27 execution failed");*/
+            getLastCudaError("ScaleFC_RhoSq_comp_27 execution failed");
 		    //////////////////////////////////////////////////////////////////////////
            // ScaleFC_RhoSq_3rdMom_comp_27(para->getParD(0)->d0SP.f[0],      para->getParD(1)->d0SP.f[0], 
 										 //para->getParD(0)->neighborX_SP,   para->getParD(0)->neighborY_SP,    para->getParD(0)->neighborZ_SP, 
@@ -1754,16 +1754,16 @@ void Simulation::run()
              //    para->getParD(0)->offCF);
              //getLastCudaError("ScaleCF_0817_comp_27 execution failed");
 		    ////////////////////////////////////////////////////////////////////////
-           // ScaleCF_Fix_comp_27(para->getParD(0)->d0SP.f[0],      para->getParD(1)->d0SP.f[0],                
-							    //para->getParD(0)->neighborX_SP,   para->getParD(0)->neighborY_SP,    para->getParD(0)->neighborZ_SP,
-							    //para->getParD(1)->neighborX_SP,   para->getParD(1)->neighborY_SP,    para->getParD(1)->neighborZ_SP,
-							    //para->getParD(0)->size_Mat_SP,    para->getParD(1)->size_Mat_SP,     para->getParD(0)->evenOrOdd,
-							    //para->getParD(0)->intCF.ICellCFC, para->getParD(0)->intCF.ICellCFF, 
-							    //para->getParD(0)->K_CF,           para->getParD(0)->omega,           para->getParD(1)->omega, 
-							    //para->getParD(0)->vis,            para->getParD(0)->nx,              para->getParD(0)->ny, 
-							    //para->getParD(1)->nx,             para->getParD(1)->ny,              para->getParD(0)->numberofthreads,
-							    //para->getParD(0)->offCF);
-           // getLastCudaError("ScaleCF_Fix_comp_27 execution failed");
+            ScaleCF_Fix_comp_27(para->getParD(0)->d0SP.f[0],      para->getParD(1)->d0SP.f[0],                
+							    para->getParD(0)->neighborX_SP,   para->getParD(0)->neighborY_SP,    para->getParD(0)->neighborZ_SP,
+							    para->getParD(1)->neighborX_SP,   para->getParD(1)->neighborY_SP,    para->getParD(1)->neighborZ_SP,
+							    para->getParD(0)->size_Mat_SP,    para->getParD(1)->size_Mat_SP,     para->getParD(0)->evenOrOdd,
+							    para->getParD(0)->intCF.ICellCFC, para->getParD(0)->intCF.ICellCFF, 
+							    para->getParD(0)->K_CF,           para->getParD(0)->omega,           para->getParD(1)->omega, 
+							    para->getParD(0)->vis,            para->getParD(0)->nx,              para->getParD(0)->ny, 
+							    para->getParD(1)->nx,             para->getParD(1)->ny,              para->getParD(0)->numberofthreads,
+							    para->getParD(0)->offCF);
+            getLastCudaError("ScaleCF_Fix_comp_27 execution failed");
 		    ////////////////////////////////////////////////////////////////////////
              //ScaleCF_RhoSq_comp_27(para->getParD(0)->d0SP.f[0], para->getParD(1)->d0SP.f[0],
              //    para->getParD(0)->neighborX_SP, para->getParD(0)->neighborY_SP, para->getParD(0)->neighborZ_SP,
diff --git a/targets/apps/HULC/main.cpp b/targets/apps/HULC/main.cpp
index 499774200f7b9a34ddbc966c07d361e0b7bc2017..85bf0f37ff211ca53842ac14bb053156a288a290 100644
--- a/targets/apps/HULC/main.cpp
+++ b/targets/apps/HULC/main.cpp
@@ -266,7 +266,7 @@ void multipleLevel(const std::string& configPath)
     //gridBuilder->writeGridToVTK("D:/GRIDGENERATION/gridTestCuboid_level_0", 0);
     //gridBuilder->writeGridToVTK("D:/GRIDGENERATION/gridTestCuboid_level_1", 1);
 
-    //SimulationFileWriter::write("D:/GRIDGENERATION/couplingVF/primitive_sphere/simu/", gridBuilder, FILEFORMAT::ASCII);
+    //SimulationFileWriter::write("D:/GRIDGENERATION/couplingVF/test/simu/", gridBuilder, FILEFORMAT::ASCII);
 
     //const uint level = 2;
     //gridBuilder->addFineGrid(0.0, 0.0, 0.0, 10.0, 10.0, 10.0, level);