diff --git a/src/storm-parsers/parser/FormulaParserGrammar.cpp b/src/storm-parsers/parser/FormulaParserGrammar.cpp
index 53f3ba6c8..afb21561b 100644
--- a/src/storm-parsers/parser/FormulaParserGrammar.cpp
+++ b/src/storm-parsers/parser/FormulaParserGrammar.cpp
@@ -180,7 +180,7 @@ namespace storm {
             constantDefinition.name("constant definition");
 
             // Shielding properties
-            shieldExpression = (qi::lit("<") > label > qi::lit(",") > shieldingType > -(qi::lit(",") > shieldComparison) > qi::lit(">"))[qi::_val = phoenix::bind(&FormulaParserGrammar::createShieldExpression, phoenix::ref(*this), qi::_2, qi::_1, qi::_3)];
+            shieldExpression = (qi::lit("<") > shieldingType > -(qi::lit(",") > shieldComparison) > qi::lit(">"))[qi::_val = phoenix::bind(&FormulaParserGrammar::createShieldExpression, phoenix::ref(*this), qi::_1, qi::_2)];
 
             shieldExpression.name("shield expression");
 
@@ -645,12 +645,12 @@ namespace storm {
             return std::make_pair(comparisonType, value);
         }
 
-        std::shared_ptr<storm::logic::ShieldExpression const> FormulaParserGrammar::createShieldExpression(storm::logic::ShieldingType type, std::string name, boost::optional<std::pair<storm::logic::ShieldComparison, double>> comparisonStruct) {
+        std::shared_ptr<storm::logic::ShieldExpression const> FormulaParserGrammar::createShieldExpression(storm::logic::ShieldingType type, boost::optional<std::pair<storm::logic::ShieldComparison, double>> comparisonStruct) {
             if(comparisonStruct.is_initialized()) {
-                return std::shared_ptr<storm::logic::ShieldExpression>(new storm::logic::ShieldExpression(type, name, comparisonStruct.get().first, comparisonStruct.get().second));
+                return std::shared_ptr<storm::logic::ShieldExpression>(new storm::logic::ShieldExpression(type, comparisonStruct.get().first, comparisonStruct.get().second));
             } else {
                 STORM_LOG_INFO("Construction of shield without a comparison parameter (lambda or gamma) will default to 'lambda=0'");
-                return std::shared_ptr<storm::logic::ShieldExpression>(new storm::logic::ShieldExpression(type, name));
+                return std::shared_ptr<storm::logic::ShieldExpression>(new storm::logic::ShieldExpression(type));
             }
         }
 
diff --git a/src/storm-parsers/parser/FormulaParserGrammar.h b/src/storm-parsers/parser/FormulaParserGrammar.h
index 97089658e..c4916ffbb 100644
--- a/src/storm-parsers/parser/FormulaParserGrammar.h
+++ b/src/storm-parsers/parser/FormulaParserGrammar.h
@@ -249,7 +249,7 @@ namespace storm {
             std::shared_ptr<storm::logic::Formula const> createGameFormula(storm::logic::PlayerCoalition const& coalition, std::shared_ptr<storm::logic::Formula const> const& subformula) const;
 
             std::pair<storm::logic::ShieldComparison, double> createShieldComparisonStruct(storm::logic::ShieldComparison comparisonType, double value);
-            std::shared_ptr<storm::logic::ShieldExpression const> createShieldExpression(storm::logic::ShieldingType type, std::string name, boost::optional<std::pair<storm::logic::ShieldComparison, double>> comparisonStruct);
+            std::shared_ptr<storm::logic::ShieldExpression const> createShieldExpression(storm::logic::ShieldingType type, boost::optional<std::pair<storm::logic::ShieldComparison, double>> comparisonStruct);
 
             bool areConstantDefinitionsAllowed() const;
             void addConstant(std::string const& name, ConstantDataType type, boost::optional<storm::expressions::Expression> const& expression);
diff --git a/src/storm/logic/ShieldExpression.cpp b/src/storm/logic/ShieldExpression.cpp
index 841d1a400..9902f625a 100644
--- a/src/storm/logic/ShieldExpression.cpp
+++ b/src/storm/logic/ShieldExpression.cpp
@@ -6,11 +6,11 @@ namespace storm {
     namespace logic {
         ShieldExpression::ShieldExpression() {}
 
-        ShieldExpression::ShieldExpression(ShieldingType type, std::string filename) : type(type), filename(filename) {
+        ShieldExpression::ShieldExpression(ShieldingType type) : type(type) {
             //Intentionally left empty
         }
 
-        ShieldExpression::ShieldExpression(ShieldingType type, std::string filename, ShieldComparison comparison, double value) : type(type), filename(filename), comparison(comparison), value(value) {
+        ShieldExpression::ShieldExpression(ShieldingType type, ShieldComparison comparison, double value) : type(type), comparison(comparison), value(value) {
             //Intentionally left empty
         }
 
@@ -74,11 +74,7 @@ namespace storm {
             prettyString += "-Shield ";
             prettyString += "with " + comparisonType + " comparison (" + comparisonToString() + " = " + std::to_string(value) + "):";
             return prettyString;
-        }
-
-        std::string ShieldExpression::getFilename() const {
-            return filename;
-        }
+        }    
 
         std::ostream& operator<<(std::ostream& out, ShieldExpression const& shieldExpression) {
             out << shieldExpression.toString();
diff --git a/src/storm/logic/ShieldExpression.h b/src/storm/logic/ShieldExpression.h
index 808ebddf9..eddf0becb 100644
--- a/src/storm/logic/ShieldExpression.h
+++ b/src/storm/logic/ShieldExpression.h
@@ -18,8 +18,8 @@ namespace storm {
         class ShieldExpression {
         public:
             ShieldExpression();
-            ShieldExpression(ShieldingType type, std::string filename);
-            ShieldExpression(ShieldingType type, std::string filename, ShieldComparison comparison, double value);
+            ShieldExpression(ShieldingType type);
+            ShieldExpression(ShieldingType type, ShieldComparison comparison, double value);
 
             bool isRelative() const;
             bool isPreSafetyShield() const;
@@ -34,15 +34,12 @@ namespace storm {
             std::string comparisonToString() const;
             std::string toString() const;
             std::string prettify() const;
-            std::string getFilename() const;
             friend std::ostream& operator<<(std::ostream& stream, ShieldExpression const& shieldExpression);
 
         private:
             ShieldingType type;
             ShieldComparison comparison = ShieldComparison::Relative;
             double value = 0;
-
-            std::string filename;
         };
     }
 }
diff --git a/src/storm/modelchecker/prctl/helper/SparseMdpPrctlHelper.cpp b/src/storm/modelchecker/prctl/helper/SparseMdpPrctlHelper.cpp
index 68951bf1b..c1d0071e2 100644
--- a/src/storm/modelchecker/prctl/helper/SparseMdpPrctlHelper.cpp
+++ b/src/storm/modelchecker/prctl/helper/SparseMdpPrctlHelper.cpp
@@ -695,6 +695,7 @@ namespace storm {
 
                 std::vector<ValueType> choiceValues = std::vector<ValueType>(transitionMatrix.getRowGroupIndices().at(transitionMatrix.getRowGroupIndices().size() - 1), storm::utility::zero<ValueType>());
                 auto choice_it = maybeStateChoiceValues.begin();
+                // TODO THIS IS BUGGY!! 
                 for(uint state = 0; state < transitionMatrix.getRowGroupIndices().size() - 1; state++) {
                     uint rowGroupSize = transitionMatrix.getRowGroupIndices().at(state + 1) - transitionMatrix.getRowGroupIndices().at(state);
                     if (qualitativeStateSets.maybeStates.get(state)) {
diff --git a/src/storm/shields/AbstractShield.cpp b/src/storm/shields/AbstractShield.cpp
index abb57f57e..82f27bdc9 100644
--- a/src/storm/shields/AbstractShield.cpp
+++ b/src/storm/shields/AbstractShield.cpp
@@ -33,12 +33,6 @@ namespace tempest {
         std::string AbstractShield<ValueType, IndexType>::getClassName() const {
             return std::string(boost::core::demangled_name(BOOST_CORE_TYPEID(*this)));
         }
-
-        template<typename ValueType, typename IndexType>
-        std::string AbstractShield<ValueType, IndexType>::getShieldFileName() const {
-            return shieldingExpression->getFilename() + ".shield";
-        }
-
         
         // Explicitly instantiate appropriate
         template class AbstractShield<double, typename storm::storage::SparseMatrix<double>::index_type>;
diff --git a/src/storm/shields/AbstractShield.h b/src/storm/shields/AbstractShield.h
index 8ca8d9117..9ef54775e 100644
--- a/src/storm/shields/AbstractShield.h
+++ b/src/storm/shields/AbstractShield.h
@@ -49,8 +49,7 @@ namespace tempest {
             storm::OptimizationDirection getOptimizationDirection();
 
             std::string getClassName() const;
-            std::string getShieldFileName() const;
-
+            
             virtual void printToStream(std::ostream& out, std::shared_ptr<storm::models::sparse::Model<ValueType>> const& model) = 0;
             virtual void printJsonToStream(std::ostream& out, std::shared_ptr<storm::models::sparse::Model<ValueType>> const& model) = 0;
 
diff --git a/src/storm/shields/ShieldHandling.cpp b/src/storm/shields/ShieldHandling.cpp
index fc5d48bfc..bcef9332c 100644
--- a/src/storm/shields/ShieldHandling.cpp
+++ b/src/storm/shields/ShieldHandling.cpp
@@ -2,10 +2,6 @@
 
 namespace tempest {
     namespace shields {
-        std::string shieldFilename(std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression) {
-            return shieldingExpression->getFilename() + ".shield";
-        }
-
         template<typename ValueType, typename IndexType>
         std::unique_ptr<tempest::shields::AbstractShield<ValueType, IndexType>> createShield(std::shared_ptr<storm::models::sparse::Model<ValueType>> model, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates) {
             if(coalitionStates.is_initialized()) coalitionStates.get().complement();
diff --git a/src/storm/shields/ShieldHandling.h b/src/storm/shields/ShieldHandling.h
index e50d3e860..1fff9a6a0 100644
--- a/src/storm/shields/ShieldHandling.h
+++ b/src/storm/shields/ShieldHandling.h
@@ -20,9 +20,7 @@
 #include "storm/exceptions/InvalidArgumentException.h"
 
 namespace tempest {
-    namespace shields {
-        std::string shieldFilename(std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression);
-
+    namespace shields {     
         template<typename ValueType, typename IndexType = storm::storage::sparse::state_type>
         std::unique_ptr<tempest::shields::AbstractShield<ValueType, IndexType>> createShield(std::shared_ptr<storm::models::sparse::Model<ValueType>> model, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);