diff --git a/src/main/java/org/gcube/portlets/user/dataminermanager/server/dmservice/SClient4WPS.java b/src/main/java/org/gcube/portlets/user/dataminermanager/server/dmservice/SClient4WPS.java
index ccf98b7..dacc6c4 100644
--- a/src/main/java/org/gcube/portlets/user/dataminermanager/server/dmservice/SClient4WPS.java
+++ b/src/main/java/org/gcube/portlets/user/dataminermanager/server/dmservice/SClient4WPS.java
@@ -49,7 +49,7 @@ import org.gcube.portlets.user.dataminermanager.shared.data.output.ImageResource
 import org.gcube.portlets.user.dataminermanager.shared.data.output.MapResource;
 import org.gcube.portlets.user.dataminermanager.shared.data.output.ObjectResource;
 import org.gcube.portlets.user.dataminermanager.shared.data.output.Resource;
-import org.gcube.portlets.user.dataminermanager.shared.exception.DataMinerServiceException;
+import org.gcube.portlets.user.dataminermanager.shared.exception.ServiceException;
 import org.gcube.portlets.user.dataminermanager.shared.parameters.ObjectParameter;
 import org.gcube.portlets.user.dataminermanager.shared.parameters.Parameter;
 import org.gcube.portlets.user.dataminermanager.shared.parameters.TabularListParameter;
@@ -880,7 +880,7 @@ public class SClient4WPS extends SClient {
 								if ((failure != null && !failure.isEmpty())) {
 									logger.debug("WPS FAILURE: " + failure);
 									computationStatus = new ComputationStatus(
-											new DataMinerServiceException(
+											new ServiceException(
 													failure));
 								} else {
 									String paused = statusType
@@ -890,7 +890,7 @@ public class SClient4WPS extends SClient {
 									if (paused != null && !paused.isEmpty()) {
 										logger.debug("WPS PAUSED: " + paused);
 										computationStatus = new ComputationStatus(
-												new DataMinerServiceException(
+												new ServiceException(
 														paused));
 									} else {
 										String success = statusType
@@ -1390,7 +1390,7 @@ public class SClient4WPS extends SClient {
 			logger.debug("ComputationData: " + computationData);
 			return computationData;
 
-		} catch (DataMinerServiceException e) {
+		} catch (ServiceException e) {
 			logger.error("Error in getComutationDataByComputationProperties: "
 					+ e.getLocalizedMessage());
 			e.printStackTrace();
diff --git a/src/main/java/org/gcube/portlets/user/dataminermanager/server/storage/StorageUtil.java b/src/main/java/org/gcube/portlets/user/dataminermanager/server/storage/StorageUtil.java
index ee62575..ff8444d 100644
--- a/src/main/java/org/gcube/portlets/user/dataminermanager/server/storage/StorageUtil.java
+++ b/src/main/java/org/gcube/portlets/user/dataminermanager/server/storage/StorageUtil.java
@@ -7,7 +7,6 @@ import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.Map;
 
-import org.apache.log4j.Logger;
 import org.gcube.common.homelibrary.home.HomeLibrary;
 import org.gcube.common.homelibrary.home.exceptions.HomeNotFoundException;
 import org.gcube.common.homelibrary.home.exceptions.InternalErrorException;
@@ -25,6 +24,8 @@ import org.gcube.contentmanager.storageclient.wrapper.AccessType;
 import org.gcube.contentmanager.storageclient.wrapper.MemoryType;
 import org.gcube.contentmanager.storageclient.wrapper.StorageClient;
 import org.gcube.portlets.user.dataminermanager.shared.exception.ServiceException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * 
@@ -34,7 +35,7 @@ import org.gcube.portlets.user.dataminermanager.shared.exception.ServiceExceptio
  */
 public class StorageUtil {
 
-	private static Logger logger = Logger.getLogger(StorageUtil.class);
+	private static Logger logger = LoggerFactory.getLogger(StorageUtil.class);
 
 	/**
 	 * 
diff --git a/src/main/java/org/gcube/portlets/user/dataminermanager/shared/exception/DataMinerServiceException.java b/src/main/java/org/gcube/portlets/user/dataminermanager/shared/exception/DataMinerServiceException.java
deleted file mode 100644
index fb667ba..0000000
--- a/src/main/java/org/gcube/portlets/user/dataminermanager/shared/exception/DataMinerServiceException.java
+++ /dev/null
@@ -1,37 +0,0 @@
-package org.gcube.portlets.user.dataminermanager.shared.exception;
-
-/**
- * DataMiner Service Exception
- * 
- * @author "Giancarlo Panichi"
- *
- */
-public class DataMinerServiceException extends
-		ServiceException {
-
-	private static final long serialVersionUID = -4831171355042165166L;
-
-	/**
-	 * 
-	 */
-	public DataMinerServiceException() {
-		super();
-	}
-
-	/**
-	 * @param message
-	 */
-	public DataMinerServiceException(String message) {
-		super(message);
-	}
-
-	/**
-	 * 
-	 * @param message
-	 * @param t
-	 */
-	public DataMinerServiceException(String message, Throwable t) {
-		super(message, t);
-	}
-
-}
diff --git a/src/main/java/org/gcube/portlets/user/dataminermanager/shared/process/ComputationStatus.java b/src/main/java/org/gcube/portlets/user/dataminermanager/shared/process/ComputationStatus.java
index 91bb84f..47864c8 100644
--- a/src/main/java/org/gcube/portlets/user/dataminermanager/shared/process/ComputationStatus.java
+++ b/src/main/java/org/gcube/portlets/user/dataminermanager/shared/process/ComputationStatus.java
@@ -3,7 +3,7 @@ package org.gcube.portlets.user.dataminermanager.shared.process;
 import java.io.Serializable;
 import java.util.Date;
 
-import org.gcube.portlets.user.dataminermanager.shared.exception.DataMinerServiceException;
+import org.gcube.portlets.user.dataminermanager.shared.exception.ServiceException;
 
 /**
  * 
@@ -23,7 +23,7 @@ public class ComputationStatus implements Serializable {
 	private Status status;
 	private Date endDate;
 	private String message;
-	private DataMinerServiceException error;
+	private ServiceException error;
 
 	public ComputationStatus() {
 		this.status = Status.ACCEPTED;
@@ -41,7 +41,7 @@ public class ComputationStatus implements Serializable {
 		this.status = status;
 	}
 
-	public ComputationStatus(DataMinerServiceException error) {
+	public ComputationStatus(ServiceException error) {
 		super();
 		this.percentage = 100f;
 		this.status = Status.FAILED;
@@ -110,11 +110,11 @@ public class ComputationStatus implements Serializable {
 		this.message = message;
 	}
 
-	public DataMinerServiceException getError() {
+	public ServiceException getError() {
 		return error;
 	}
 
-	public void setError(DataMinerServiceException error) {
+	public void setError(ServiceException error) {
 		this.error = error;
 	}