diff --git a/src/builder/DdJaniModelBuilder.cpp b/src/builder/DdJaniModelBuilder.cpp
index c05afd4ca..98f075bac 100644
--- a/src/builder/DdJaniModelBuilder.cpp
+++ b/src/builder/DdJaniModelBuilder.cpp
@@ -312,7 +312,7 @@ namespace storm {
             void createVariable(storm::jani::BoundedIntegerVariable const& variable, CompositionVariables<Type, ValueType>& result) {
                 int_fast64_t low = variable.getLowerBound().evaluateAsInt();
                 int_fast64_t high = variable.getUpperBound().evaluateAsInt();
-                std::pair<storm::expressions::Variable, storm::expressions::Variable> variablePair = result.manager->addMetaVariable(variable.getName(), low, high);
+                std::pair<storm::expressions::Variable, storm::expressions::Variable> variablePair = result.manager->addMetaVariable(variable.getExpressionVariable().getName(), low, high);
                 
                 STORM_LOG_TRACE("Created meta variables for global integer variable: " << variablePair.first.getName() << " and " << variablePair.second.getName() << ".");
                 
@@ -332,7 +332,7 @@ namespace storm {
             }
             
             void createVariable(storm::jani::BooleanVariable const& variable, CompositionVariables<Type, ValueType>& result) {
-                std::pair<storm::expressions::Variable, storm::expressions::Variable> variablePair = result.manager->addMetaVariable(variable.getName());
+                std::pair<storm::expressions::Variable, storm::expressions::Variable> variablePair = result.manager->addMetaVariable(variable.getExpressionVariable().getName());
                 
                 STORM_LOG_TRACE("Created meta variables for global boolean variable: " << variablePair.first.getName() << " and " << variablePair.second.getName() << ".");
                 
diff --git a/src/parser/ExpressionParser.cpp b/src/parser/ExpressionParser.cpp
index 3054f2fe0..64a0f9213 100644
--- a/src/parser/ExpressionParser.cpp
+++ b/src/parser/ExpressionParser.cpp
@@ -379,6 +379,8 @@ namespace storm {
                 STORM_LOG_THROW(this->identifiers_ != nullptr, storm::exceptions::WrongFormatException, "Unable to substitute identifier expressions without given mapping.");
                 storm::expressions::Expression const* expression = this->identifiers_->find(identifier);
                 if (expression == nullptr) {
+                    std::cout << "didn't find " << identifier << std::endl;
+                    identifiers_->for_each([] (std::string const& name, storm::expressions::Expression const& expr) { std::cout << "name: " << name << ", " << expr << std::endl; });
                     pass = false;
                     return manager->boolean(false);
                 }
diff --git a/src/parser/JaniParser.cpp b/src/parser/JaniParser.cpp
index bed238255..ebcb07d4a 100644
--- a/src/parser/JaniParser.cpp
+++ b/src/parser/JaniParser.cpp
@@ -26,7 +26,7 @@ namespace storm {
         const bool JaniParser::defaultBooleanInitialValue = false;
         const double JaniParser::defaultRationalInitialValue = 0.0;
         const int64_t JaniParser::defaultIntegerInitialValue = 0;
-        const std::string VARIABLE_AUTOMATON_DELIMITER = "KUCHEN";
+        const std::string VARIABLE_AUTOMATON_DELIMITER = "_";
         const std::set<std::string> JaniParser::unsupportedOpstrings({"sin", "cos", "tan", "cot", "sec", "csc", "asin", "acos", "atan", "acot", "asec", "acsc",
                                                          "sinh", "cosh", "tanh", "coth", "sech", "csch", "asinh", "acosh", "atanh", "asinh", "acosh"});
 
@@ -744,4 +744,4 @@ namespace storm {
             
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/storage/jani/Variable.cpp b/src/storage/jani/Variable.cpp
index 9280b7c8e..8551f14df 100644
--- a/src/storage/jani/Variable.cpp
+++ b/src/storage/jani/Variable.cpp
@@ -16,6 +16,10 @@ namespace storm {
             // Intentionally left empty.
         }
 
+        Variable::~Variable() {
+            // Intentionally left empty.
+        }
+        
         storm::expressions::Variable const& Variable::getExpressionVariable() const {
             return variable;
         }
@@ -95,4 +99,4 @@ namespace storm {
         }
         
     }
-}
\ No newline at end of file
+}
diff --git a/src/storage/jani/Variable.h b/src/storage/jani/Variable.h
index f58ddab0f..cbbe4aa69 100644
--- a/src/storage/jani/Variable.h
+++ b/src/storage/jani/Variable.h
@@ -27,7 +27,7 @@ namespace storm {
              */
             Variable(std::string const& name, storm::expressions::Variable const& variable, bool transient = false);
             
-            virtual ~Variable() = default;
+            virtual ~Variable();
             
             /*!
              * Retrieves the associated expression variable