diff --git a/CMake/cmake_config_files/MOLLOK.config.cmake b/CMake/cmake_config_files/MOLLOK.config.cmake
index 4bb199d69dd2f88f786752374d244c643ca51d8a..2407cda6287cd0e171453d1559ab6585b0a09a33 100644
--- a/CMake/cmake_config_files/MOLLOK.config.cmake
+++ b/CMake/cmake_config_files/MOLLOK.config.cmake
@@ -5,8 +5,6 @@
 #################################################################################
 
 #SET TO CORRECT PATH:
-SET(BOOST_ROOT  "D:/libraries/boost_1_74_0"  CACHE PATH "BOOST_ROOT")
-SET(BOOST_LIBRARYDIR  "D:/libraries/boost_1_74_0/stageMSVC64VS2019/lib" CACHE PATH "BOOST_LIBRARYDIR")
 SET(CMAKE_CUDA_ARCHITECTURES 52)
 
 SET(PATH_NUMERICAL_TESTS "D:/out/numericalTests/")
diff --git a/src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp b/src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp
index 45323203a1d540ddd630c9e7751a4340329e0da9..5add06165da4d213f8a1d483435c3fc1bd7bbef6 100644
--- a/src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp
+++ b/src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp
@@ -336,13 +336,21 @@ void postCollisionBC(Parameter* para, int level, unsigned int t)
         //           para->getParD(level)->size_Mat_SP,           para->getParD(level)->evenOrOdd);
         //getLastCudaError("QDevComp27 (Geom) execution failed");
 
-        QVelDevComp27(para->getParD(level)->numberofthreads, para->getParD(level)->nx,           para->getParD(level)->ny,
-                      para->getParD(level)->QGeom.Vx,        para->getParD(level)->QGeom.Vy,     para->getParD(level)->QGeom.Vz,
-                      para->getParD(level)->d0SP.f[0],       para->getParD(level)->QGeom.k,      para->getParD(level)->QGeom.q27[0], 
-                      para->getParD(level)->QGeom.kQ,        para->getParD(level)->QGeom.kQ,     para->getParD(level)->omega,
-                      para->getParD(level)->neighborX_SP,    para->getParD(level)->neighborY_SP, para->getParD(level)->neighborZ_SP,
-                      para->getParD(level)->size_Mat_SP,     para->getParD(level)->evenOrOdd);
-        getLastCudaError("QVelDevComp27 execution failed");
+        //QVelDevComp27(para->getParD(level)->numberofthreads, para->getParD(level)->nx,           para->getParD(level)->ny,
+        //              para->getParD(level)->QGeom.Vx,        para->getParD(level)->QGeom.Vy,     para->getParD(level)->QGeom.Vz,
+        //              para->getParD(level)->d0SP.f[0],       para->getParD(level)->QGeom.k,      para->getParD(level)->QGeom.q27[0], 
+        //              para->getParD(level)->QGeom.kQ,        para->getParD(level)->QGeom.kQ,     para->getParD(level)->omega,
+        //              para->getParD(level)->neighborX_SP,    para->getParD(level)->neighborY_SP, para->getParD(level)->neighborZ_SP,
+        //              para->getParD(level)->size_Mat_SP,     para->getParD(level)->evenOrOdd);
+        //getLastCudaError("QVelDevComp27 execution failed");
+
+   		QVelDevCompZeroPress27(	para->getParD(0)->numberofthreads, para->getParD(0)->nx,           para->getParD(0)->ny,
+								para->getParD(0)->QGeom.Vx,        para->getParD(0)->QGeom.Vy,     para->getParD(0)->QGeom.Vz,
+								para->getParD(0)->d0SP.f[0],       para->getParD(0)->QGeom.k,      para->getParD(0)->QGeom.q27[0], 
+								para->getParD(0)->QGeom.kQ,        para->getParD(0)->QGeom.kQ,     para->getParD(0)->omega,
+								para->getParD(0)->neighborX_SP,    para->getParD(0)->neighborY_SP, para->getParD(0)->neighborZ_SP,
+								para->getParD(0)->size_Mat_SP,     para->getParD(0)->evenOrOdd);
+		getLastCudaError("QVelDevCompZeroPress27 execution failed");
 
         //QDev3rdMomentsComp27( para->getParD(level)->numberofthreads,       para->getParD(level)->nx,           para->getParD(level)->ny,
         //                      para->getParD(level)->d0SP.f[0],             para->getParD(level)->QGeom.k,      para->getParD(level)->QGeom.q27[0], 
diff --git a/src/gpu/VirtualFluids_GPU/GPU/LBMKernel.cu b/src/gpu/VirtualFluids_GPU/GPU/LBMKernel.cu
index 41bde987cb1b5f517c6303226966bfd5909702a2..a203cca15bfd0fccac53d1d86555a023063ea86a 100644
--- a/src/gpu/VirtualFluids_GPU/GPU/LBMKernel.cu
+++ b/src/gpu/VirtualFluids_GPU/GPU/LBMKernel.cu
@@ -30,7 +30,7 @@ extern "C" void KernelCas27( unsigned int grid_nx,
    dim3 threads       ( grid_nx, 1, 1 );
    dim3 grid          ( grid_ny, grid_nz );   // Gitter fuer Kollision und Propagation
 
-      LB_Kernel_Casc27<< < grid, threads >>>( s9,
+      LB_Kernel_Casc27<<< grid, threads >>>( s9,
                                              bcMatD,
                                              neighborX,
                                              neighborY,
@@ -3324,21 +3324,21 @@ extern "C" void QVelDevCompZeroPress27(   unsigned int numberOfThreads,
 										  unsigned int size_Mat, 
 										  bool evenOrOdd)
 {
-   int Grid = kArray / numberOfThreads;
-   //int Grid = (kQ / numberOfThreads)+1;
-   //int Grid1, Grid2;
-   //if (Grid>512)
-   //{
-   //   Grid1 = 512;
-   //   Grid2 = (Grid/Grid1)+1;
-   //} 
-   //else
-   //{
-   //   Grid1 = 1;
-   //   Grid2 = Grid;
-   //}
-   //dim3 gridQ(Grid1, Grid2);
-   dim3 gridQ(Grid, 1, 1);
+   //int Grid = kArray / numberOfThreads;
+   int Grid = (sizeQ / numberOfThreads)+1;
+   int Grid1, Grid2;
+   if (Grid>512)
+   {
+      Grid1 = 512;
+      Grid2 = (Grid/Grid1)+1;
+   } 
+   else
+   {
+      Grid1 = 1;
+      Grid2 = Grid;
+   }
+   dim3 gridQ(Grid1, Grid2);
+   //dim3 gridQ(Grid, 1, 1);
    dim3 threads(numberOfThreads, 1, 1 );
 
       QVelDeviceCompZeroPress27<<< gridQ, threads >>> (   nx,
@@ -3357,7 +3357,7 @@ extern "C" void QVelDevCompZeroPress27(   unsigned int numberOfThreads,
 														  neighborZ,
 														  size_Mat, 
 														  evenOrOdd);
-      getLastCudaError("QVelDeviceComp27 execution failed"); 
+      getLastCudaError("QVelDeviceCompZeroPress27 execution failed"); 
 }
 //////////////////////////////////////////////////////////////////////////
 extern "C" void QVelDevIncompHighNu27(unsigned int numberOfThreads,