diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/instances/base/ElementManagement.java b/src/main/java/org/gcube/informationsystem/resourceregistry/instances/base/ElementManagement.java
index 94881bc..41df377 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/instances/base/ElementManagement.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/instances/base/ElementManagement.java
@@ -1165,6 +1165,10 @@ public abstract class ElementManagement<El extends OElement, T extends Type> {
 		
 		Set<PropertyDefinition> definedProperties = getAllProperties();
 		
+		if(definedProperties==null) {
+			// The type could define no property
+			return;
+		}
 		
 		for(PropertyDefinition propertyDefinition : definedProperties) {