diff --git a/src/VirtualFluids_GPU/Application/App.cpp b/src/VirtualFluids_GPU/Application/App.cpp
deleted file mode 100644
index 38ac5d54661fd7c398c0bd75b3cb9b5c64bb1709..0000000000000000000000000000000000000000
--- a/src/VirtualFluids_GPU/Application/App.cpp
+++ /dev/null
@@ -1,26 +0,0 @@
-#include "LBM/LB.h"
-#include "App.h"
-#include "Communication/Communicator.h"
-#include "LBM/Simulation.h"
-
-App* App::instanz = 0;
-App* App::getInstanz()
-{
-   if( instanz == 0 )
-      instanz = new App();
-   return instanz;
-}
-void App::run(std::string &cstr)
-{
-	try
-	{
-      Simulation sim;
-      sim.init(cstr);
-      sim.run();
-	}
-   catch (std::string e)
-	{
-      std::cout << e << std::flush;
-      //MPI_Abort(MPI_COMM_WORLD, -1);
-	}
-}
diff --git a/src/VirtualFluids_GPU/Application/App.h b/src/VirtualFluids_GPU/Application/App.h
deleted file mode 100644
index ee87221fec213a681e396fe172277e2df2c6f01c..0000000000000000000000000000000000000000
--- a/src/VirtualFluids_GPU/Application/App.h
+++ /dev/null
@@ -1,32 +0,0 @@
-#ifndef _APP_H_
-#define _APP_H_
-#include <string>
-
-#include <VirtualFluidsDefinitions.h>
-
-////Gemeinsame Variablen
-//Buffer2D <float> sbuf_t; 
-//Buffer2D <float> rbuf_t;
-//Buffer2D <float> sbuf_b;
-//Buffer2D <float> rbuf_b;
-//
-////for MPI
-//Communicator* comm;
-//int numprocs, myid;
-//
-//WriteLog output;
-
-class App
-{
-public:
-	VF_PUBLIC static App* getInstanz();
-    VF_PUBLIC void run(std::string &cstr);
-protected:
-
-private:
-   static App* instanz;
-   App(){}
-   App(const App&);
-};
-
-#endif
diff --git a/src/VirtualFluids_GPU/Application/package.include b/src/VirtualFluids_GPU/Application/package.include
deleted file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000
diff --git a/src/VirtualFluids_GPU/Calculation/ForceCalculations.h b/src/VirtualFluids_GPU/Calculation/ForceCalculations.h
index 051330081e23d0260a589227bec3ad69c85488c3..078cbddb546806148eb22d34b1e3dd62b4599068 100644
--- a/src/VirtualFluids_GPU/Calculation/ForceCalculations.h
+++ b/src/VirtualFluids_GPU/Calculation/ForceCalculations.h
@@ -2,7 +2,6 @@
 #define FORCE_CALCULATIONS_H
 
 #include "Parameter/Parameter.h"
-#include "Utilities/StringUtil.hpp"
 #include "basics/utilities/UbSystem.h"
 
 #include <iostream>
diff --git a/src/VirtualFluids_GPU/LBM/Simulation.cpp b/src/VirtualFluids_GPU/LBM/Simulation.cpp
index ee82a1ae05f2979b848a917f54d0e29db260adda..f3cebe10a3f67ca2a54631f1a40a37539825286f 100644
--- a/src/VirtualFluids_GPU/LBM/Simulation.cpp
+++ b/src/VirtualFluids_GPU/LBM/Simulation.cpp
@@ -54,11 +54,14 @@
 
 Simulation::Simulation(void)
 {
+
 }
 
 Simulation::~Simulation(void)
 {
+
 }
+
 void Simulation::init(std::string &cstr)
 {
    comm = Communicator::getInstanz();
@@ -318,10 +321,12 @@ void Simulation::init(std::string &cstr)
    output << "used Device Memory: " << para->getMemsizeGPU() / 1000000.0 << " MB\n";
    //////////////////////////////////////////////////////////////////////////
 }
+
 void Simulation::bulk()
 {
 
 }
+
 void Simulation::run()
 {
    double ftimeE, ftimeS, fnups, durchsatz;
@@ -2632,6 +2637,7 @@ void Simulation::run()
    }
    //////////////////////////////////////////////////////////////////////////
 }
+
 void Simulation::porousMedia()
 {
 	double porosity, darcySI, forchheimerSI;
@@ -2722,6 +2728,7 @@ void Simulation::porousMedia()
 	//////////////////////////////////////////////////////////////////////////
 
 }
+
 void Simulation::definePMarea(PorousMedia* pMedia)
 {
 	unsigned int counter = 0;
diff --git a/src/VirtualFluids_GPU/LBM/Simulation.h b/src/VirtualFluids_GPU/LBM/Simulation.h
index b9aff57d04ba728d74dd8f1f19d5b9b4b65aa87c..fcb4973a07fdab8b5706e316883432c5046ed687 100644
--- a/src/VirtualFluids_GPU/LBM/Simulation.h
+++ b/src/VirtualFluids_GPU/LBM/Simulation.h
@@ -1,8 +1,9 @@
 #ifndef _SIMULATION_H_
 #define _SIMULATION_H_
 
+#include <VirtualFluidsDefinitions.h>
+
 #include "Output/LogWriter.hpp"
-#include "Communication/Communicator.h"
 #include "Utilities/Buffer2D.hpp"
 //#include "Input/ConfigFile.h"
 #include "Calculation/ForceCalculations.h"
@@ -10,12 +11,13 @@
 #include "Parameter/Parameter.h"
 #include "Restart/RestartPostprocessor.h"
 #include "Restart/RestartObject.h"
-#include "Utilities/StringUtil.hpp"
 #include "LBM/LB.h"
 //#include "LBM/D3Q27.h"
 
+class Communicator;
+
 
-class Simulation
+class VF_PUBLIC Simulation
 {
 public:
 	Simulation(void);
diff --git a/targets/apps/HULC/3rdPartyLinking.cmake b/targets/apps/HULC/3rdPartyLinking.cmake
index c8c5c6b37c53272bac5796008e64a30558a2e6bd..8b3f2165fbda545baffb5189c08550aa0ccbf3c0 100644
--- a/targets/apps/HULC/3rdPartyLinking.cmake
+++ b/targets/apps/HULC/3rdPartyLinking.cmake
@@ -2,6 +2,8 @@ include (${CMAKE_SOURCE_DIR}/${cmakeMacroPath}/MPI/Link.cmake)
 linkMPI(${targetName})
 include (${CMAKE_SOURCE_DIR}/${cmakeMacroPath}/Cuda/Link.cmake)
 linkCuda(${targetName})
+include (${CMAKE_SOURCE_DIR}/${cmakeMacroPath}/Boost/Link.cmake)
+linkBoost(${targetName} "serialization")
 
 if(HULC.BUILD_JSONCPP)
   include (${CMAKE_SOURCE_DIR}/${cmakeMacroPath}/JsonCpp/Link.cmake)
diff --git a/targets/apps/HULC/main.cpp b/targets/apps/HULC/main.cpp
index b9ab13fce6bec1c3b9e615e361477d118a10b3f4..4bc2a17042d1eb4a2a3f076d9cbc87627cf46ff0 100644
--- a/targets/apps/HULC/main.cpp
+++ b/targets/apps/HULC/main.cpp
@@ -9,10 +9,11 @@
 #include <string>
 #include <iostream>
 
-#include "VirtualFluids_GPU/Application/App.h"
+#include "LBM/Simulation.h"
 using namespace std;
 
-int main( int argc, char* argv[]){
+int main( int argc, char* argv[])
+{
    MPI_Init(&argc, &argv);
    string str, str2; 
    if ( argv != NULL )
@@ -21,7 +22,17 @@ int main( int argc, char* argv[]){
       if (argc > 1)
       {
          str2 = static_cast<string>(argv[1]);
-         App::getInstanz()->run(str2);
+         try
+         {
+             Simulation sim;
+             sim.init(str2);
+             sim.run();
+         }
+         catch (std::string e)
+         {
+             std::cout << e << std::flush;
+             //MPI_Abort(MPI_COMM_WORLD, -1);
+         }
       }
       else
       {