diff --git a/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/DeleteRequest.java b/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/DeleteRequest.java
index b9fce92..ec10d97 100644
--- a/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/DeleteRequest.java
+++ b/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/DeleteRequest.java
@@ -4,6 +4,7 @@ import java.util.Objects;
 import java.util.UUID;
 
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
+import org.gcube.resourcemanagement.manager.io.codeexceptions.LocalCodeException;
 import org.gcube.resourcemanagement.manager.io.codeexceptions.WebCodeException;
 import org.gcube.resourcemanagement.manager.io.rs.RMDeleteContextCode;
 
@@ -29,11 +30,10 @@ public final class DeleteRequest extends RequestToResourceRegistry {
 	 * @see org.gcube.resourcemanagement.manager.webapp.context.RequestToResourceRegistry#validate()
 	 */
 	@Override
-	public RequestToResourceRegistry validate() throws Exception {
-		if (!new Queries().contextExists(context, resourceRegistryContextClient)) {
-			ResponseFromResourceRegistry.fromException(new WebCodeException(RMDeleteContextCode.CONTEXT_DOES_NOT_EXIST));	
+	public void validate() throws LocalCodeException {
+		if (!new Queries().contextExists(context, this.getContextClient())) {
+			throw new LocalCodeException(RMDeleteContextCode.CONTEXT_DOES_NOT_EXIST);
 		}
-		return null;
 	}
 
 	/* (non-Javadoc)
@@ -42,7 +42,7 @@ public final class DeleteRequest extends RequestToResourceRegistry {
 	@Override
 	protected ResponseFromResourceRegistry send() {
 		try {
-			boolean deleted = resourceRegistryContextClient.delete(context);
+			boolean deleted = this.getContextClient().delete(context);
 			if (!deleted) {
 				ResponseFromResourceRegistry.fromException(new WebCodeException(RMDeleteContextCode.GENERIC_ERROR_FROM_RR));
 			}
diff --git a/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/Queries.java b/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/Queries.java
index 0db4ff6..f6e08e0 100644
--- a/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/Queries.java
+++ b/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/Queries.java
@@ -47,9 +47,8 @@ final class Queries {
 		try {
 			return client(registryClient).read(uuid);
 		} catch (ResourceRegistryException e) {
-			e.printStackTrace();
+			return null;
 		}
-		return null;
 	}
 
 	private ResourceRegistryContextClient client(ResourceRegistryContextClient ... registryClient) {
diff --git a/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/RequestToResourceRegistry.java b/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/RequestToResourceRegistry.java
index 958721b..dfc4249 100644
--- a/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/RequestToResourceRegistry.java
+++ b/webapp/src/main/java/org/gcube/resourcemanagement/manager/webapp/context/RequestToResourceRegistry.java
@@ -5,8 +5,8 @@ import java.util.Objects;
 import org.gcube.informationsystem.resourceregistry.context.ResourceRegistryContextClient;
 import org.gcube.informationsystem.resourceregistry.context.ResourceRegistryContextClientFactory;
 import org.gcube.informationsystem.resourceregistry.context.ResourceRegistryContextClientImpl;
+import org.gcube.resourcemanagement.manager.io.codeexceptions.LocalCodeException;
 import org.gcube.resourcemanagement.manager.io.codeexceptions.WebCodeException;
-import org.gcube.resourcemanagement.manager.io.rs.RMCreateContextCode;
 
 /**
  * Base request to an operation exposed by the Resource Registry.
@@ -31,16 +31,16 @@ public abstract class RequestToResourceRegistry {
 	/**
 	 * Validates the request.
 	 * 
-	 * @return the response from the service.
+	 * @throws LocalCodeException 
 	 */
-	abstract public RequestToResourceRegistry validate() throws Exception;
+	abstract public void validate() throws LocalCodeException;
 
 	public ResponseFromResourceRegistry submit() {
 		try {
 			this.validate();
-		} catch (Exception e) {
+		} catch (LocalCodeException e) {
 			ResponseFromResourceRegistry response = ResponseFromResourceRegistry.
-					fromException(new WebCodeException(RMCreateContextCode.INVALID_REQUEST_FOR_RR));
+					fromException(new WebCodeException(e));
 			return response;
 		}
 		if (Objects.isNull(this.resourceRegistryContextClient))
@@ -58,6 +58,13 @@ public abstract class RequestToResourceRegistry {
 		// by default, returns the response as it is
 		return response;
 	}
+	
+	/**
+	 * @return the context client
+	 */
+	ResourceRegistryContextClient getContextClient() {
+		return resourceRegistryContextClient;
+	}
 
 	/**
 	 * Submits the request to the RR.