diff --git a/AlgebraicDataflowArchitectureModel/src/generators/CodeGeneratorFromDataFlowGraph.java b/AlgebraicDataflowArchitectureModel/src/generators/CodeGeneratorFromDataFlowGraph.java
index 96b422f..f8ecbc6 100644
--- a/AlgebraicDataflowArchitectureModel/src/generators/CodeGeneratorFromDataFlowGraph.java
+++ b/AlgebraicDataflowArchitectureModel/src/generators/CodeGeneratorFromDataFlowGraph.java
@@ -679,7 +679,8 @@
 		// Check duplication.
 		String getterName = getterPrefix + getComponentName(resourceNode.getResourceHierarchy(), langSpec);
 		for (MethodDeclaration method: ancestorComponent.getMethods()) {
-			if (method.getName().equals(getterName) && method.getParameters().size() == getterParams.size()) return null;
+			if (method.getName().equals(getterName) 
+					&& (method.getParameters() == null ? 0 : method.getParameters().size()) == getterParams.size()) return null;
 		}
 		
 		// Declare the getter method of the resource state.
diff --git a/AlgebraicDataflowArchitectureModel/src/generators/JavaCodeGenerator.java b/AlgebraicDataflowArchitectureModel/src/generators/JavaCodeGenerator.java
index b646911..32b9289 100644
--- a/AlgebraicDataflowArchitectureModel/src/generators/JavaCodeGenerator.java
+++ b/AlgebraicDataflowArchitectureModel/src/generators/JavaCodeGenerator.java
@@ -391,7 +391,8 @@
 				for (Map.Entry<ResourceHierarchy, MethodDeclaration> entry: getters) {
 					ResourceHierarchy r = entry.getKey();
 					MethodDeclaration m = entry.getValue();
-					if (r == ancestorNode.getResourceHierarchy() && m.getName().equals(getterName) && m.getParameters().size() == getterParams.size()) {
+					if (r == ancestorNode.getResourceHierarchy() && m.getName().equals(getterName) 
+							&& (m.getParameters() == null ? 0 : m.getParameters().size()) == getterParams.size()) {
 						bExists = true;
 						break;
 					}
diff --git a/AlgebraicDataflowArchitectureModel/src/generators/JerseyCodeGenerator.java b/AlgebraicDataflowArchitectureModel/src/generators/JerseyCodeGenerator.java
index 0dc0551..151ab6e 100644
--- a/AlgebraicDataflowArchitectureModel/src/generators/JerseyCodeGenerator.java
+++ b/AlgebraicDataflowArchitectureModel/src/generators/JerseyCodeGenerator.java
@@ -417,7 +417,8 @@
 				for (Map.Entry<ResourceHierarchy, MethodDeclaration> entry: getters) {
 					ResourceHierarchy r = entry.getKey();
 					MethodDeclaration m = entry.getValue();
-					if (r == ancestorNode.getResourceHierarchy() && m.getName().equals(getterName) && m.getParameters().size() == pathParams.size()) {
+					if (r == ancestorNode.getResourceHierarchy() && m.getName().equals(getterName) 
+							&& (m.getParameters() == null ? 0 : m.getParameters().size()) == pathParams.size()) {
 						bExists = true;
 						break;
 					}