diff --git a/src/modelchecker/region/SparseDtmcRegionModelChecker.cpp b/src/modelchecker/region/SparseDtmcRegionModelChecker.cpp
index e507a23d5..ba87f778f 100644
--- a/src/modelchecker/region/SparseDtmcRegionModelChecker.cpp
+++ b/src/modelchecker/region/SparseDtmcRegionModelChecker.cpp
@@ -236,7 +236,7 @@ namespace storm {
             
             STORM_LOG_THROW(this->probabilityOperatorFormula!=nullptr, storm::exceptions::InvalidStateException, "Tried to analyze a region although no property has been specified" );
             STORM_LOG_DEBUG("Analyzing the region " << region.toString());
-            
+            //std::cout << "Analyzing the region " << region.toString() << std::endl;
             
             //switches for the different steps.
             bool done=false;
@@ -395,7 +395,7 @@ namespace storm {
                     }
                     break;
                 default:
-                    STORM_LOG_THROW(false, storm::exceptions::UnexpectedException, "The checkresult of the current region should not be conclusive, i.e. it should be either EXISTSSAT or EXISTSVIOLATED or UNKNOWN");
+                     STORM_LOG_WARN("The checkresult of the current region should not be conclusive, i.e. it should be either EXISTSSAT or EXISTSVIOLATED or UNKNOWN in order to apply approximative probabilities");
             }
             
             if(region.getCheckResult()==RegionCheckResult::UNKNOWN){
diff --git a/src/modelchecker/region/SparseDtmcRegionModelChecker.h b/src/modelchecker/region/SparseDtmcRegionModelChecker.h
index 0dca1f257..0e37c51e2 100644
--- a/src/modelchecker/region/SparseDtmcRegionModelChecker.h
+++ b/src/modelchecker/region/SparseDtmcRegionModelChecker.h
@@ -31,9 +31,7 @@ namespace storm {
             };
             
             class ParameterRegion;
-            class ApproximationModel;
-            class SamplingModel;
-            
+
             explicit SparseDtmcRegionModelChecker(storm::models::sparse::Dtmc<ParametricType> const& model);
 
             /*!
@@ -81,6 +79,10 @@ namespace storm {
             
         private:
             
+            class ApproximationModel;
+            class SamplingModel;
+            
+            
             /*!
              * Computes a model with a single target and a single sink state.
              * Eliminates all states for which the outgoing transitions are constant.
diff --git a/src/utility/regions.cpp b/src/utility/regions.cpp
index 1cd013f81..92a072ad3 100644
--- a/src/utility/regions.cpp
+++ b/src/utility/regions.cpp
@@ -56,13 +56,8 @@ namespace storm {
             
             template<>
             storm::RationalNumber convertNumber<std::string, storm::RationalNumber>(std::string const& number){
-                if(number.find('e')!=std::string::npos){
-                    //carl::rationalize does not seem to like the scientific notation like (e-05).
-                    //A quick and easy fix is to parse the number as double and then as a rational number.
-                    STORM_LOG_WARN("Parsing number " + number + " might result in precision issues as we are going to interprete it as double and then convert the double to a rational number")
-                    return convertNumber<double, storm::RationalNumber>(convertNumber<std::string, double>(number));
-                }
-                return carl::rationalize<storm::RationalNumber>(number);
+                //We parse the number as double and then convert it to a a rational number.
+                return convertNumber<double, storm::RationalNumber>(convertNumber<std::string, double>(number));
             }