diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/SDMXClient.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/SDMXClient.java
index 7a31e2b..715de54 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/SDMXClient.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/SDMXClient.java
@@ -55,6 +55,7 @@ public class SDMXClient {
     	SDMXRegistryDescriptorImpl descriptor = new SDMXRegistryDescriptorImpl();
 		descriptor.setUrl(SDMXRegistryInterfaceType.RESTV2_1, url);
 		client = new FusionRegistryClient(descriptor);
+		
 	}
 	
 	
diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/opexecution/OpExecution4DataMinerOperation.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/opexecution/OpExecution4DataMinerOperation.java
index 4325226..d2e82cb 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/opexecution/OpExecution4DataMinerOperation.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/opexecution/OpExecution4DataMinerOperation.java
@@ -27,7 +27,7 @@ public class OpExecution4DataMinerOperation extends OpExecutionBuilder {
 			.getLogger(OpExecution4DataMinerOperation.class);
 
 	private TabularDataService service;
-	private ServiceCredentials serviceCredentials;
+	//private ServiceCredentials serviceCredentials;
 	private DataMinerOperationSession dataMinerOperationSession;
 
 
@@ -35,7 +35,7 @@ public class OpExecution4DataMinerOperation extends OpExecutionBuilder {
 			TabularDataService service,ServiceCredentials serviceCredentials,
 			DataMinerOperationSession dataMinerOperationSession) {
 		this.service = service;
-		this.serviceCredentials = serviceCredentials;
+		//this.serviceCredentials = serviceCredentials;
 		this.dataMinerOperationSession = dataMinerOperationSession;
 	}
 
@@ -50,7 +50,7 @@ public class OpExecution4DataMinerOperation extends OpExecutionBuilder {
 		operationDefinition = OperationDefinitionMap.map(
 				OperationsId.StatisticalOperation.toString(), service);
 		
-		map.put(Constants.PARAMETER_DATAMINER_GCUBETOKEN, serviceCredentials.getToken());
+		//map.put(Constants.PARAMETER_DATAMINER_GCUBETOKEN, serviceCredentials.getToken());
 		map.put(Constants.PARAMETER_DATAMINER_OPERATOR, dataMinerOperationSession.getOperator());		
 		
 		invocation = new OperationExecution(