diff --git a/apps/ccam/ccam.cpp b/apps/ccam/ccam.cpp
index 8714b70..8d157a2 100644
--- a/apps/ccam/ccam.cpp
+++ b/apps/ccam/ccam.cpp
@@ -1,558 +1,565 @@
 //===-- apps/ccam/ccam.cpp --------------------------------------*- C++ -*-===//
 //
 //                 The RoSA Framework -- Application CCAM
 //
 // Distributed under the terms and conditions of the Boost Software
 /// License 1.0.
 // See accompanying file LICENSE.
 //
 // If you did not receive a copy of the license file, see
 // http://www.boost.org/LICENSE_1_0.txt.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file apps/ccam/ccam.cpp
 ///
 /// \author Maximilian Goetzinger (maximilian.goetzinger@tuwien.ac.at)
 /// \author Benedikt Tutzer (benedikt.tutzer@tuwien.ac.at)
 ///
 /// \date 2019
 ///
 /// \brief The application CCAM implements the case study from the paper:
 /// M. Goetzinger, N. TaheriNejad, H. A. Kholerdi, A. Jantsch, E. Willegger,
 /// T. Glatzl, A.M. Rahmani, T.Sauter, P. Liljeberg: Model - Free Condition
 /// Monitoring with Confidence
 ///
 /// \todo Clean up source files of this app: add standard RoSA header comment
 /// for own files and do something with 3rd party files...
 //===----------------------------------------------------------------------===//
 #include "rosa/agent/Abstraction.hpp"
 #include "rosa/agent/Confidence.hpp"
 #include "rosa/agent/FunctionAbstractions.hpp"
 #include <iostream>
 
 #include "rosa/config/version.h"
 
 #include "rosa/agent/SignalStateDetector.hpp"
 #include "rosa/agent/SystemStateDetector.hpp"
 #include "rosa/app/Application.hpp"
 
 #include "rosa/support/csv/CSVReader.hpp"
 #include "rosa/support/csv/CSVWriter.hpp"
 
 #include "rosa/support/mqtt/MQTTReader.hpp"
 
 #include "rosa/app/AppTuple.hpp"
 #include <fstream>
 #include <limits>
 #include <memory>
 #include <streambuf>
 
 #include "configuration.h"
 #include "statehandlerutils.h"
 
 using namespace rosa;
 using namespace rosa::agent;
 using namespace rosa::app;
 using namespace rosa::terminal;
 using namespace rosa::mqtt;
 
 const std::string AppName = "CCAM";
 
 int main(int argc, char **argv) {
 
   LOG_INFO_STREAM << '\n'
                   << library_string() << " -- " << Color::Red << AppName
                   << "app" << Color::Default << '\n';
 
   //
   // Read the filepath of the config file of the observed system. The filepath
   // is in the first argument passed to the application. Fuzzy functions etc.
   // are described in this file.
   //
   if (argc < 2) {
     LOG_ERROR("Specify config File!\nUsage:\n\tccam config.json");
     return 1;
   }
   std::string ConfigPath = argv[1];
 
   //
   // Load config file and read in all parameters. Fuzzy functions etc. are
   // described in this file.
   //
   if (!readConfigFile(ConfigPath)) {
     LOG_ERROR_STREAM << "Could not read config from \"" << ConfigPath << "\"\n";
     return 2;
   }
 
   //
   // Create a CCAM context.
   //
   LOG_INFO("Creating Context");
   std::unique_ptr<Application> AppCCAM = Application::create(AppName);
 
   //
   // Create following function which shall give information if the time gap
   // between changed input(s) and changed output(s) shows already a malfunction
   // of the system.
   //
   //              ____________
   //             /
   //            /
   // __________/
   //
   std::shared_ptr<PartialFunction<uint32_t, float>> BrokenDelayFunction(
       new PartialFunction<uint32_t, float>(
           {{{0, AppConfig.BrokenCounter},
             std::make_shared<LinearFunction<uint32_t, float>>(
                 0, 0.f, AppConfig.BrokenCounter, 1.f)},
            {{AppConfig.BrokenCounter, std::numeric_limits<uint32_t>::max()},
             std::make_shared<LinearFunction<uint32_t, float>>(1.f, 0.f)}},
           0.f));
 
   //
   // Create following function which shall give information if the time gap
   // between changed input(s) and changed output(s) still shows a
   // well-functioning system.
   //
   // ____________
   //             \
     //              \
     //               \__________
   //
   std::shared_ptr<PartialFunction<uint32_t, float>> OkDelayFunction(
       new PartialFunction<uint32_t, float>(
           {{{0, AppConfig.BrokenCounter},
             std::make_shared<LinearFunction<uint32_t, float>>(
                 0, 1.f, AppConfig.BrokenCounter, 0.f)},
            {{AppConfig.BrokenCounter, std::numeric_limits<uint32_t>::max()},
             std::make_shared<LinearFunction<uint32_t, float>>(0.f, 0.f)}},
           1.f));
 
   //
   // Create a AppAgent with SystemStateDetector functionality.
   //
   LOG_INFO("Create SystemStateDetector agent.");
   AgentHandle SystemStateDetectorAgent = createSystemStateDetectorAgent(
       AppCCAM, "SystemStateDetector", AppConfig.SignalConfigurations.size(),
       BrokenDelayFunction, OkDelayFunction);
 
   //
   // Set policy of SystemStateDetectorAgent that it wait for all
   // SignalStateDetectorAgents
   //
   std::set<size_t> pos;
   for (size_t i = 0; i < AppConfig.SignalConfigurations.size(); ++i)
     pos.insert(pos.end(), i);
   AppCCAM->setExecutionPolicy(SystemStateDetectorAgent,
                               AppExecutionPolicy::awaitAll(pos));
 
   //
   // Create Vectors for all sensors, all signal related fuzzy functions, all
   // signal state detectors, all signal state agents, and all input data files.
   //
   LOG_INFO("Creating sensors, SignalStateDetector functionalities and their "
            "Abstractions.");
   std::vector<AgentHandle> Sensors;
   std::vector<std::shared_ptr<PartialFunction<float, float>>>
       SampleMatchesFunctions;
   std::vector<std::shared_ptr<PartialFunction<float, float>>>
       SampleMismatchesFunctions;
   std::vector<std::shared_ptr<PartialFunction<float, float>>>
       SignalIsStableFunctions;
   std::vector<std::shared_ptr<PartialFunction<float, float>>>
       SignalIsDriftingFunctions;
   std::vector<std::shared_ptr<StepFunction<float, float>>>
       NumOfSamplesMatchFunctions;
   std::vector<std::shared_ptr<StepFunction<float, float>>>
       NumOfSamplesMismatchFunctions;
   std::vector<std::shared_ptr<PartialFunction<float, float>>>
       SampleValidFunctions;
   std::vector<std::shared_ptr<PartialFunction<float, float>>>
       SampleInvalidFunctions;
   std::vector<std::shared_ptr<StepFunction<float, float>>>
       NumOfSamplesValidFunctions;
   std::vector<std::shared_ptr<StepFunction<float, float>>>
       NumOfSamplesInvalidFunctions;
   std::vector<std::shared_ptr<
       SignalStateDetector<float, float, float, HistoryPolicy::FIFO>>>
       SignalStateDetectors;
   std::vector<AgentHandle> SignalStateDetectorAgents;
   std::vector<std::ifstream> DataFiles;
 
   //
   // Go through all signal state configurations (number of signals), and create
   // functionalities for SignalStateDetector.
   //
   for (auto SignalConfiguration : AppConfig.SignalConfigurations) {
 
     //
     // Create application sensors.
     //
     Sensors.emplace_back(
         AppCCAM->createSensor<float>(SignalConfiguration.Name + "_Sensor"));
 
     //
     // Create following function(s) which shall give information whether one
     // sample matches another one (based on the relative distance between them).
     //
     //              ____________
     //             /            \
         //            /              \
         // __________/                \__________
     //
     //
     SampleMatchesFunctions.emplace_back(new PartialFunction<float, float>(
         {
             {{-SignalConfiguration.OuterBound, -SignalConfiguration.InnerBound},
              std::make_shared<LinearFunction<float, float>>(
                  -SignalConfiguration.OuterBound, 0.f,
                  -SignalConfiguration.InnerBound, 1.f)},
             {{-SignalConfiguration.InnerBound, SignalConfiguration.InnerBound},
              std::make_shared<LinearFunction<float, float>>(1.f, 0.f)},
             {{SignalConfiguration.InnerBound, SignalConfiguration.OuterBound},
              std::make_shared<LinearFunction<float, float>>(
                  SignalConfiguration.InnerBound, 1.f,
                  SignalConfiguration.OuterBound, 0.f)},
         },
         0));
 
     //
     // Create following function(s) which shall give information whether one
     // sample mismatches another one (based on the relative distance between
     // them).
     //
     // ____________                ____________
     //             \              /
     //              \            /
     //               \__________/
     //
     //
     SampleMismatchesFunctions.emplace_back(new PartialFunction<float, float>(
         {
             {{-SignalConfiguration.OuterBound, -SignalConfiguration.InnerBound},
              std::make_shared<LinearFunction<float, float>>(
                  -SignalConfiguration.OuterBound, 1.f,
                  -SignalConfiguration.InnerBound, 0.f)},
             {{-SignalConfiguration.InnerBound, SignalConfiguration.InnerBound},
              std::make_shared<LinearFunction<float, float>>(0.f, 0.f)},
             {{SignalConfiguration.InnerBound, SignalConfiguration.OuterBound},
              std::make_shared<LinearFunction<float, float>>(
                  SignalConfiguration.InnerBound, 0.f,
                  SignalConfiguration.OuterBound, 1.f)},
         },
         1));
 
     //
     // Create following function(s) which shall give information whether a
     // signal is stable.
     //
     //              ____________
     //             /            \
         //            /              \
         // __________/                \__________
     //
     //
     SignalIsStableFunctions.emplace_back(new PartialFunction<float, float>(
         {
             {{-SignalConfiguration.OuterBoundDrift,
               -SignalConfiguration.InnerBoundDrift},
              std::make_shared<LinearFunction<float, float>>(
                  -SignalConfiguration.OuterBoundDrift, 0.f,
                  -SignalConfiguration.InnerBoundDrift, 1.f)},
             {{-SignalConfiguration.InnerBoundDrift,
               SignalConfiguration.InnerBoundDrift},
              std::make_shared<LinearFunction<float, float>>(1.f, 0.f)},
             {{SignalConfiguration.InnerBoundDrift,
               SignalConfiguration.OuterBoundDrift},
              std::make_shared<LinearFunction<float, float>>(
                  SignalConfiguration.InnerBoundDrift, 1.f,
                  SignalConfiguration.OuterBoundDrift, 0.f)},
         },
         0));
 
     //
     // Create following function(s) which shall give information whether a
     // signal is drifting.
     //
     // ____________                ____________
     //             \              /
     //              \            /
     //               \__________/
     //
     //
     SignalIsDriftingFunctions.emplace_back(new PartialFunction<float, float>(
         {
             {{-SignalConfiguration.OuterBoundDrift,
               -SignalConfiguration.InnerBoundDrift},
              std::make_shared<LinearFunction<float, float>>(
                  -SignalConfiguration.OuterBoundDrift, 1.f,
                  -SignalConfiguration.InnerBoundDrift, 0.f)},
             {{-SignalConfiguration.InnerBoundDrift,
               SignalConfiguration.InnerBoundDrift},
              std::make_shared<LinearFunction<float, float>>(0.f, 0.f)},
             {{SignalConfiguration.InnerBoundDrift,
               SignalConfiguration.OuterBoundDrift},
              std::make_shared<LinearFunction<float, float>>(
                  SignalConfiguration.InnerBoundDrift, 0.f,
                  SignalConfiguration.OuterBoundDrift, 1.f)},
         },
         1));
 
     //
     // Create following function(s) which shall give information how many
     // history samples match another sample.
     //
     //              ____________
     //             /
     //            /
     // __________/
     //
     NumOfSamplesMatchFunctions.emplace_back(new StepFunction<float, float>(
         1.0f / SignalConfiguration.SampleHistorySize, StepDirection::StepUp));
 
     //
     // Create following function(s) which shall give information how many
     // history samples mismatch another sample.
     //
     // ____________
     //             \
         //              \
         //               \__________
     //
     NumOfSamplesMismatchFunctions.emplace_back(new StepFunction<float, float>(
         1.0f / SignalConfiguration.SampleHistorySize, StepDirection::StepDown));
 
     //
     // Create following function(s) which shall give information how good all
     // samples in a state match each other.
     //
     //              ____________
     //             /            \
         //            /              \
         // __________/                \__________
     //
     //
     SampleValidFunctions.emplace_back(new PartialFunction<float, float>(
         {
             {{-SignalConfiguration.OuterBound, -SignalConfiguration.InnerBound},
              std::make_shared<LinearFunction<float, float>>(
                  -SignalConfiguration.OuterBound, 0.f,
                  -SignalConfiguration.InnerBound, 1.f)},
             {{-SignalConfiguration.InnerBound, SignalConfiguration.InnerBound},
              std::make_shared<LinearFunction<float, float>>(1.f, 0.f)},
             {{SignalConfiguration.InnerBound, SignalConfiguration.OuterBound},
              std::make_shared<LinearFunction<float, float>>(
                  SignalConfiguration.InnerBound, 1.f,
                  SignalConfiguration.OuterBound, 0.f)},
         },
         0));
 
     //
     // Create following function(s) which shall give information how good all
     // samples in a state mismatch each other.
     //
     // ____________                ____________
     //             \              /
     //              \            /
     //               \__________/
     //
     //
     SampleInvalidFunctions.emplace_back(new PartialFunction<float, float>(
         {
             {{-SignalConfiguration.OuterBound, -SignalConfiguration.InnerBound},
              std::make_shared<LinearFunction<float, float>>(
                  -SignalConfiguration.OuterBound, 1.f,
                  -SignalConfiguration.InnerBound, 0.f)},
             {{-SignalConfiguration.InnerBound, SignalConfiguration.InnerBound},
              std::make_shared<LinearFunction<float, float>>(0.f, 0.f)},
             {{SignalConfiguration.InnerBound, SignalConfiguration.OuterBound},
              std::make_shared<LinearFunction<float, float>>(
                  SignalConfiguration.InnerBound, 0.f,
                  SignalConfiguration.OuterBound, 1.f)},
         },
         1));
 
     //
     // Create following function(s) which shall give information how many
     // history samples match each other.
     //
     //              ____________
     //             /
     //            /
     // __________/
     //
     NumOfSamplesValidFunctions.emplace_back(new StepFunction<float, float>(
         1.0f / SignalConfiguration.SampleHistorySize, StepDirection::StepUp));
 
     //
     // Create following function(s) which shall give information how many
     // history samples mismatch each other.
     //
     // ____________
     //             \
         //              \
         //               \__________
     //
     NumOfSamplesInvalidFunctions.emplace_back(new StepFunction<float, float>(
         1.0f / SignalConfiguration.SampleHistorySize, StepDirection::StepDown));
 
     //
     // Create SignalStateDetector functionality
     //
     SignalStateDetectors.emplace_back(
         new SignalStateDetector<float, float, float, HistoryPolicy::FIFO>(
             SignalConfiguration.Output ? SignalProperties::OUTPUT
                                        : SignalProperties::INPUT,
             std::numeric_limits<int>::max(), SampleMatchesFunctions.back(),
             SampleMismatchesFunctions.back(), NumOfSamplesMatchFunctions.back(),
             NumOfSamplesMismatchFunctions.back(), SampleValidFunctions.back(),
             SampleInvalidFunctions.back(), NumOfSamplesValidFunctions.back(),
             NumOfSamplesInvalidFunctions.back(),
             SignalIsDriftingFunctions.back(), SignalIsStableFunctions.back(),
             SignalConfiguration.SampleHistorySize, SignalConfiguration.DABSize,
             SignalConfiguration.DABHistorySize));
 
     //
     // Create low-level application agents
     //
     SignalStateDetectorAgents.push_back(createSignalStateDetectorAgent(
         AppCCAM, SignalConfiguration.Name, SignalStateDetectors.back()));
 
     AppCCAM->setExecutionPolicy(
         SignalStateDetectorAgents.back(),
         AppExecutionPolicy::decimation(AppConfig.DownsamplingRate));
     //
     // Connect sensors to low-level agents.
     //
     LOG_INFO("Connect sensors to their corresponding low-level agents.");
 
     AppCCAM->connectSensor(SignalStateDetectorAgents.back(), 0, Sensors.back(),
                            SignalConfiguration.Name + "_Sensor ->" +
                                SignalConfiguration.Name +
                                "_SignalStateDetector_Agent-Channel");
 
     AppCCAM->connectAgents(
         SystemStateDetectorAgent, SignalStateDetectors.size() - 1,
         SignalStateDetectorAgents.back(),
         SignalConfiguration.Name +
             "_SignalStateDetector_Agent->SystemStateDetector_Agent_Channel");
   }
 
   //
   // For simulation output, create a logger agent writing the output of the
   // high-level agent into a CSV file.
   //
   LOG_INFO("Create a logger agent.");
 
   // Create CSV writer.
   std::ofstream OutputCSV(AppConfig.OutputFilePath);
 
   for (auto SignalConfiguration : AppConfig.SignalConfigurations) {
     OutputCSV << SignalConfiguration.Name + ",";
   }
   OutputCSV << "StateID,";
   OutputCSV << "Confidence State Valid,";
   OutputCSV << "Confidence State Invalid,";
   OutputCSV << "Confidence Inputs Matching,";
   OutputCSV << "Confidence Outputs Matching,";
   OutputCSV << "Confidence Inputs Mismatching,";
   OutputCSV << "Confidence Outputs Mismatching,";
   OutputCSV << "State Condition,";
   OutputCSV << "Confidence System Functioning,";
   OutputCSV << "Confidence System Malfunctioning,";
   OutputCSV << "Overall Confidence,";
   OutputCSV << "\n";
 
   // The agent writes each new input value into a CSV file and produces
   // nothing.
   using Input = std::pair<SystemStateTuple, bool>;
   using Result = Optional<AppTuple<unit_t>>;
   using Handler = std::function<Result(Input)>;
   std::string Name = "Logger Agent";
 
   AgentHandle LoggerAgent = AppCCAM->createAgent(
       "Logger Agent", Handler([&OutputCSV](Input I) -> Result {
         const SystemStateTuple &T = I.first;
         OutputCSV << std::get<0>(
                          static_cast<const std::tuple<std::string> &>(T))
                   << std::endl;
         return Result();
       }));
   //
   // Connect the high-level agent to the logger agent.
   //
   LOG_INFO("Connect the high-level agent to the logger agent.");
 
   AppCCAM->connectAgents(LoggerAgent, 0, SystemStateDetectorAgent,
                          "SystemStateDetector Channel");
 
   //
   // Only log if the SystemStateDetector actually ran
   //
   AppCCAM->setExecutionPolicy(LoggerAgent, AppExecutionPolicy::awaitAll({0}));
 
   //
   // Do simulation.
   //
   LOG_INFO("Setting up and performing simulation.");
 
   //
   // Initialize application for simulation.
   //
   AppCCAM->initializeSimulation();
 
   //
   // Open CSV files and register them for their corresponding sensors.
   //
   // Make sure DataFiles will not change capacity while adding elements to it.
   // Changing capacity moves elements away, which invalidates references
   // captured by CSVIterator.
   DataFiles.reserve(AppConfig.SignalConfigurations.size());
   uint32_t i = 0;
+  bool hasMQTT = false;
   for (auto SignalConfiguration : AppConfig.SignalConfigurations) {
 
     switch (SignalConfiguration.DataInterfaceType) {
     case DataInterfaceTypes::CSV:
 
       DataFiles.emplace_back(SignalConfiguration.InputPath);
       if (!DataFiles.at(i)) {
         LOG_ERROR_STREAM << "Cannot open Input File \""
                          << SignalConfiguration.InputPath << "\" for Signal \""
                          << SignalConfiguration.Name << "\"" << std::endl;
         return 3;
       }
 
       AppCCAM->registerSensorValues(Sensors.at(i),
                                     csv::CSVIterator<float>(DataFiles.at(i)),
                                     csv::CSVIterator<float>());
 
       LOG_INFO_STREAM << "Sensor " << SignalConfiguration.Name
                       << " is fed by csv file " << SignalConfiguration.InputPath
                       << std::endl;
       break;
-    case DataInterfaceTypes::MQTT:
-    {
+    case DataInterfaceTypes::MQTT: {
+      hasMQTT = true;
       auto it = MQTTIterator<float>(SignalConfiguration.MQTTTopic);
       AppCCAM->registerSensorValues(Sensors.at(i), std::move(it),
                                     MQTTIterator<float>());
       LOG_INFO_STREAM << "Sensor " << SignalConfiguration.Name
                       << " is fed by MQTT topic "
                       << SignalConfiguration.MQTTTopic << std::endl;
       break;
     }
     default:
       LOG_ERROR_STREAM << "No data source for " << SignalConfiguration.Name
                        << std::endl;
       break;
     }
     i++;
   }
 
   //
   // Start simulation.
   //
+  auto &log = LOG_WARNING_STREAM;
+  log << "Simulation starting.";
+  if (hasMQTT) {
+    log << " Publishing MQTT messages may start.";
+  }
+  log << std::endl;
   AppCCAM->simulate(AppConfig.NumberOfSimulationCycles);
 
   return 0;
 }