diff --git a/eu_basysbio/source/java/eu/basysbio/cisd/dss/TimeSeriesAndTimePointDataSetHandler.java b/eu_basysbio/source/java/eu/basysbio/cisd/dss/TimeSeriesAndTimePointDataSetHandler.java
index dcfb3f17ad9ce08eec4c3264002d6b95ae1e9f9d..7075dc61d24611b6aa5e56fed93bb08037e43905 100644
--- a/eu_basysbio/source/java/eu/basysbio/cisd/dss/TimeSeriesAndTimePointDataSetHandler.java
+++ b/eu_basysbio/source/java/eu/basysbio/cisd/dss/TimeSeriesAndTimePointDataSetHandler.java
@@ -35,7 +35,6 @@ import ch.systemsx.cisd.common.mail.MailClient;
 import ch.systemsx.cisd.common.utilities.ITimeProvider;
 import ch.systemsx.cisd.common.utilities.SystemTimeProvider;
 import ch.systemsx.cisd.etlserver.IDataSetHandler;
-import ch.systemsx.cisd.openbis.dss.generic.shared.IEncapsulatedOpenBISService;
 import ch.systemsx.cisd.openbis.dss.generic.shared.dto.DataSetInformation;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.DataSetType;
 
@@ -51,7 +50,6 @@ public class TimeSeriesAndTimePointDataSetHandler implements IDataSetHandler
     @Private
     static final String HELPDESK_EMAIL = "helpdesk.openbis.basysbio@bsse.ethz.ch";
 
-
     private static enum TypeOfDerivedDataSet
     {
         TIME_POINT("time point"), LCA_MIC_TIME_SERIES("LCA MIC time series");
@@ -153,17 +151,17 @@ public class TimeSeriesAndTimePointDataSetHandler implements IDataSetHandler
 
     }
 
-    private static final Logger operationLog =
-            LogFactory.getLogger(LogCategory.OPERATION, TimeSeriesAndTimePointDataSetHandler.class);
+    private static final Logger operationLog = LogFactory.getLogger(LogCategory.OPERATION,
+            TimeSeriesAndTimePointDataSetHandler.class);
 
     private static final FilenameFilter LCA_MIC_TIME_SERIES_FILE_FILTER = new FilenameFilter()
-    {
-
-        public boolean accept(File dir, String name)
         {
-            return name.startsWith(DataSetHandler.LCA_MIC_TIME_SERIES);
-        }
-    };
+
+            public boolean accept(File dir, String name)
+            {
+                return name.startsWith(DataSetHandler.LCA_MIC_TIME_SERIES);
+            }
+        };
 
     private final IDataSetHandler delegator;
 
@@ -171,24 +169,19 @@ public class TimeSeriesAndTimePointDataSetHandler implements IDataSetHandler
 
     private final ITimeProvider timeProvider;
 
-    private final IEncapsulatedOpenBISService service;
-
     public TimeSeriesAndTimePointDataSetHandler(Properties parentProperties,
-            IDataSetHandler delegator, IEncapsulatedOpenBISService openbisService)
+            IDataSetHandler delegator)
     {
         this.delegator = delegator;
-        this.service = openbisService;
         this.mailClient = new MailClient(parentProperties);
         timeProvider = SystemTimeProvider.SYSTEM_TIME_PROVIDER;
     }
 
     @Private
-    TimeSeriesAndTimePointDataSetHandler(IDataSetHandler delegator,
-            IEncapsulatedOpenBISService openbisService, IMailClient mailClient,
+    TimeSeriesAndTimePointDataSetHandler(IDataSetHandler delegator, IMailClient mailClient,
             ITimeProvider timeProvider)
     {
         this.delegator = delegator;
-        service = openbisService;
         this.mailClient = mailClient;
         this.timeProvider = timeProvider;
     }
@@ -205,28 +198,21 @@ public class TimeSeriesAndTimePointDataSetHandler implements IDataSetHandler
             {
                 DataSetInformation dataSetInformation = result.get(0);
                 MessageBuilder builder =
-                    new MessageBuilder(dataSetInformation.tryGetUploadingUserEmail(), timeProvider);
+                        new MessageBuilder(dataSetInformation.tryGetUploadingUserEmail(),
+                                timeProvider);
                 builder.setDataSetFileName(dataSet);
                 File[] files = dataSet.getParentFile().listFiles(LCA_MIC_TIME_SERIES_FILE_FILTER);
                 handleDerivedDataSets(files, TypeOfDerivedDataSet.LCA_MIC_TIME_SERIES, delegator,
-                        dataSetInfos, builder);                
+                        dataSetInfos, builder);
                 DataSetType dataSetType = dataSetInformation.getDataSetType();
                 boolean lcaMicTimeSeries =
-                    dataSetType.getCode().equals(DataSetHandler.LCA_MIC_TIME_SERIES);
-                builder.logSendEMailAndHandlerError(operationLog, mailClient, lcaMicTimeSeries == false);
+                        dataSetType.getCode().equals(DataSetHandler.LCA_MIC_TIME_SERIES);
+                builder.logSendEMailAndHandlerError(operationLog, mailClient,
+                        lcaMicTimeSeries == false);
             } catch (RuntimeException ex)
             {
-                // Data sets are deleted in reverse order because of possible parent-child relationships.
-                for (int i = dataSetInfos.size() - 1; i >= 0; i--)
-                {
-                    String dataSetCode = dataSetInfos.get(i).getDataSetCode();
-                    if (operationLog.isInfoEnabled())
-                    {
-                        operationLog.info("Delete data set " + dataSetCode);
-                    }
-                    service.deleteDataSet(dataSetCode, "Rollback registration");
-                }
-                throw ex;
+                // NOTE: the code to delete data sets is not supported any more
+                throw new RuntimeException("Exception can't be handled properly any more.", ex);
             }
         }
         return dataSetInfos;
diff --git a/eu_basysbio/sourceTest/java/eu/basysbio/cisd/dss/TimeSeriesAndTimePointDataSetHandlerTest.java b/eu_basysbio/sourceTest/java/eu/basysbio/cisd/dss/TimeSeriesAndTimePointDataSetHandlerTest.java
index 3547d08c0aa641e0883f7959766d24a7535acaea..9ac66133a0337585263591e475d8b21ba793167c 100644
--- a/eu_basysbio/sourceTest/java/eu/basysbio/cisd/dss/TimeSeriesAndTimePointDataSetHandlerTest.java
+++ b/eu_basysbio/sourceTest/java/eu/basysbio/cisd/dss/TimeSeriesAndTimePointDataSetHandlerTest.java
@@ -40,16 +40,13 @@ import ch.systemsx.cisd.common.mail.From;
 import ch.systemsx.cisd.common.mail.IMailClient;
 import ch.systemsx.cisd.common.utilities.ITimeProvider;
 import ch.systemsx.cisd.etlserver.IDataSetHandler;
-import ch.systemsx.cisd.openbis.dss.generic.shared.IEncapsulatedOpenBISService;
 import ch.systemsx.cisd.openbis.dss.generic.shared.dto.DataSetInformation;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.DataSetType;
 
 /**
- * 
- *
  * @author Franz-Josef Elmer
  */
-@Friend(toClasses=TimeSeriesAndTimePointDataSetHandler.class)
+@Friend(toClasses = TimeSeriesAndTimePointDataSetHandler.class)
 public class TimeSeriesAndTimePointDataSetHandlerTest extends AbstractFileSystemTestCase
 {
     private static final class StringMatcher extends BaseMatcher<String>
@@ -77,15 +74,20 @@ public class TimeSeriesAndTimePointDataSetHandlerTest extends AbstractFileSystem
             description.appendText(expectedString);
         }
     }
-    
+
     private Mockery context;
+
     private IDataSetHandler delegator;
+
     private IMailClient mailClient;
+
     private IDataSetHandler handler;
+
     private File dropBox;
+
     private File timePointFolder;
+
     private ITimeProvider timeProvider;
-    private IEncapsulatedOpenBISService service;
 
     @BeforeMethod
     public void beforeMethod() throws Exception
@@ -94,15 +96,12 @@ public class TimeSeriesAndTimePointDataSetHandlerTest extends AbstractFileSystem
         LogInitializer.init();
         context = new Mockery();
         delegator = context.mock(IDataSetHandler.class, "delegator");
-        service = context.mock(IEncapsulatedOpenBISService.class);
         mailClient = context.mock(IMailClient.class);
         timeProvider = context.mock(ITimeProvider.class);
         dropBox = new File(workingDirectory, "drop-box");
         timePointFolder = new File(workingDirectory, "time-point-folder");
         timePointFolder.mkdirs();
-        handler =
-                new TimeSeriesAndTimePointDataSetHandler(delegator, service, mailClient,
-                        timeProvider);
+        handler = new TimeSeriesAndTimePointDataSetHandler(delegator, mailClient, timeProvider);
     }
 
     @AfterMethod
@@ -112,7 +111,7 @@ public class TimeSeriesAndTimePointDataSetHandlerTest extends AbstractFileSystem
         // Otherwise one does not known which test failed.
         context.assertIsSatisfied();
     }
-    
+
     @Test
     public void testFailingTimeSeriesRegistration()
     {
@@ -123,9 +122,9 @@ public class TimeSeriesAndTimePointDataSetHandlerTest extends AbstractFileSystem
                     will(returnValue(Arrays.asList()));
                 }
             });
-        
+
         List<DataSetInformation> dataSets = handler.handleDataSet(dropBox);
-        
+
         assertEquals(0, dataSets.size());
         context.assertIsSatisfied();
     }
@@ -185,7 +184,7 @@ public class TimeSeriesAndTimePointDataSetHandlerTest extends AbstractFileSystem
         assertSame(dataSetInformation, dataSets.get(0));
         context.assertIsSatisfied();
     }
-    
+
     private void prepareSendingEMail(final String expectedSubject, final String expectedMessage,
             final DataSetInformation dataSetInformation, final boolean alsoToHelpDesk)
     {
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/ETLService.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/ETLService.java
index f2cc86e2880c491335a8771c6a40ba330f1f6fa2..cdf4599db4b373bc0922a39218b8e4866605e1e6 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/ETLService.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/ETLService.java
@@ -58,7 +58,6 @@ import ch.systemsx.cisd.openbis.generic.server.dataaccess.IDataStoreDAO;
 import ch.systemsx.cisd.openbis.generic.server.dataaccess.IEntityTypeDAO;
 import ch.systemsx.cisd.openbis.generic.server.dataaccess.IPersonDAO;
 import ch.systemsx.cisd.openbis.generic.server.dataaccess.ISampleTypeDAO;
-import ch.systemsx.cisd.openbis.generic.server.plugin.IDataSetTypeSlaveServerPlugin;
 import ch.systemsx.cisd.openbis.generic.shared.IDataStoreService;
 import ch.systemsx.cisd.openbis.generic.shared.IETLLIMSService;
 import ch.systemsx.cisd.openbis.generic.shared.IServer;
@@ -73,7 +72,6 @@ import ch.systemsx.cisd.openbis.generic.shared.basic.dto.DataStoreServiceKind;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.DatabaseInstance;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.DatastoreServiceDescription;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.DeletedDataSet;
-import ch.systemsx.cisd.openbis.generic.shared.basic.dto.DeletionType;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.DetailedSearchCriteria;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.EntityType;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.Experiment;
@@ -154,13 +152,13 @@ import ch.systemsx.cisd.openbis.generic.shared.translator.EntityPropertyTranslat
 import ch.systemsx.cisd.openbis.generic.shared.translator.ExperimentTranslator;
 import ch.systemsx.cisd.openbis.generic.shared.translator.ExperimentTranslator.LoadableFields;
 import ch.systemsx.cisd.openbis.generic.shared.translator.ExperimentTypeTranslator;
-import ch.systemsx.cisd.openbis.generic.shared.translator.SpaceTranslator;
 import ch.systemsx.cisd.openbis.generic.shared.translator.MaterialTranslator;
 import ch.systemsx.cisd.openbis.generic.shared.translator.PersonTranslator;
 import ch.systemsx.cisd.openbis.generic.shared.translator.ProjectTranslator;
 import ch.systemsx.cisd.openbis.generic.shared.translator.SampleTranslator;
 import ch.systemsx.cisd.openbis.generic.shared.translator.SampleTypeTranslator;
 import ch.systemsx.cisd.openbis.generic.shared.translator.SimpleDataSetHelper;
+import ch.systemsx.cisd.openbis.generic.shared.translator.SpaceTranslator;
 import ch.systemsx.cisd.openbis.generic.shared.translator.VocabularyTermTranslator;
 import ch.systemsx.cisd.openbis.generic.shared.util.HibernateUtils;
 
@@ -694,21 +692,6 @@ public class ETLService extends AbstractCommonServer<IETLLIMSService> implements
         registerDataSetInternal(session, experimentIdentifier, externalData);
     }
 
-    public void deleteDataSet(String sessionToken, String dataSetCode, String reason)
-            throws UserFailureException
-    {
-        Session session = getSession(sessionToken);
-        IDataDAO dataSetDAO = getDAOFactory().getDataDAO();
-        DataPE dataSet = dataSetDAO.tryToFindFullDataSetByCode(dataSetCode, false, false);
-        if (dataSet != null && dataSet.isExternalData())
-        {
-            DataSetTypePE dataSetType = dataSet.getDataSetType();
-            IDataSetTypeSlaveServerPlugin plugin = getDataSetTypeSlaveServerPlugin(dataSetType);
-            plugin.deleteDataSets(session, Collections.singletonList(dataSet), reason,
-                    DeletionType.PERMANENT);
-        }
-    }
-
     public void addPropertiesToDataSet(String sessionToken, List<NewProperty> properties,
             String dataSetCode, SpaceIdentifier space) throws UserFailureException
     {
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/IETLLIMSService.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/IETLLIMSService.java
index a170e6a0cc2a6f49bdd1b86d08ddf0306088aff1..1624225b8eabb5886630e8be109818117d80ecbd 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/IETLLIMSService.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/IETLLIMSService.java
@@ -341,21 +341,6 @@ public interface IETLLIMSService extends IServer, ISessionProvider
             @AuthorizationGuard(guardClass = SpaceIdentifierPredicate.class) final ExperimentIdentifier experimentIdentifier,
             final NewExternalData externalData) throws UserFailureException;
 
-    /**
-     * Deletes the specified data set if it exists.
-     * 
-     * @param sessionToken The user authentication token. Must not be <code>null</code>.
-     * @param dataSetCode Data set code.
-     * @param reason Reason for deleting.
-     * @throws UserFailureException if given data set code could not be deleted.
-     */
-    @Transactional
-    @RolesAllowed(RoleWithHierarchy.SPACE_ETL_SERVER)
-    @DatabaseCreateOrDeleteModification(value = ObjectKind.DATA_SET)
-    public void deleteDataSet(String sessionToken,
-            @AuthorizationGuard(guardClass = DataSetCodePredicate.class) String dataSetCode,
-            String reason) throws UserFailureException;
-
     /**
      * Checks that the user of specified session has INSTANCE_ADMIN access rights.
      */