diff --git a/src/org/gcube/vremanagement/vremodeler/impl/ModelerService.java b/src/org/gcube/vremanagement/vremodeler/impl/ModelerService.java
index 268e4d8..4e96588 100644
--- a/src/org/gcube/vremanagement/vremodeler/impl/ModelerService.java
+++ b/src/org/gcube/vremanagement/vremodeler/impl/ModelerService.java
@@ -17,17 +17,26 @@ import org.gcube.common.core.informationsystem.client.AtomicCondition;
 import org.gcube.common.core.informationsystem.client.ISClient;
 import org.gcube.common.core.informationsystem.client.queries.GCUBERIQuery;
 import org.gcube.common.core.resources.GCUBECollection;
+import org.gcube.common.core.resources.GCUBEMCollection;
 import org.gcube.common.core.resources.GCUBERunningInstance;
 import org.gcube.common.core.resources.impl.kxml.KGCUBEResource;
 import org.gcube.common.core.types.VOID;
 import org.gcube.common.core.utils.logging.GCUBELog;
+import org.gcube.metadatamanagement.metadatabroker.stubs.FindPossibleTransformationPrograms;
+import org.gcube.metadatamanagement.metadatabroker.stubs.FindPossibleTransformationProgramsResponse;
+import org.gcube.metadatamanagement.metadatabroker.stubs.MetadataBrokerFormat;
+import org.gcube.metadatamanagement.metadatabroker.stubs.MetadataBrokerPortType;
+import org.gcube.metadatamanagement.metadatabroker.stubs.Transform;
 import org.gcube.vremanagement.vremanager.stubs.vremanager.AddResourcesParameters;
 import org.gcube.vremanagement.vremanager.stubs.vremanager.ResourceItem;
 import org.gcube.vremanagement.vremanager.stubs.vremanager.ResourceList;
 import org.gcube.vremanagement.vremanager.stubs.vremanager.ScopeOption;
+import org.gcube.vremanagement.vremanager.stubs.vremanager.ServiceList;
 import org.gcube.vremanagement.vremanager.stubs.vremanager.VREManagerPortType;
 import org.gcube.vremanagement.vremanager.stubs.vremanager.service.VREManagerServiceAddressingLocator;
 import org.gcube.vremanagement.vremodeler.db.DBInterface;
+import org.gcube.vremanagement.vremodeler.impl.util.MBrokerServiceHandler;
+import org.gcube.vremanagement.vremodeler.impl.util.MetadataFormat;
 import org.gcube.vremanagement.vremodeler.impl.util.XMLUtil;
 import org.gcube.vremanagement.vremodeler.stubs.CollectionArray;
 import org.gcube.vremanagement.vremodeler.stubs.FunctionalityIDArray;
@@ -156,7 +165,7 @@ public class ModelerService {
 	public void setGHNs(GHNArray request) throws GCUBEFault{
 		try{
 			String instanceID=(String) getResource().getId();
-			DBInterface.ExecuteUpdate("DELETE FROM VRERELATEDDHN WHERE VRERELATEDDHN.vreid='"+instanceID+"';");
+			DBInterface.ExecuteUpdate("DELETE FROM VRERELATEDGHN WHERE VRERELATEDDHN.vreid='"+instanceID+"';");
 
 			String dlKey=instanceID;
 
@@ -462,6 +471,7 @@ public class ModelerService {
 	public void setVREtoPendingState(VOID var) throws GCUBEFault{
 		try{
 			DBInterface.ExecuteUpdate("UPDATE VRE SET STATUS='Pending' WHERE VRE.id='"+getResource().getId()+"';");
+			
 		}catch(Exception e){throw new GCUBEFault(e);}
 	}
 
@@ -554,7 +564,7 @@ public class ModelerService {
 
 				//retrieving Collection
 				try{
-					ResultSet resRelatedCol =DBInterface.queryDB("select VRERELATEDCOLLECTION.collid from VRERELATEDCOLLECTION where VRERELATEDCOLLECTION.dlid='"+resourceID+"';");
+					ResultSet resRelatedCol =DBInterface.queryDB("select VRERELATEDCOLLECTION.collid from VRERELATEDCOLLECTION where VRERELATEDCOLLECTION.vreid='"+resourceID+"';");
 					while (resRelatedCol.next()){
 						resItem= new ResourceItem();
 						resItem.setID(resRelatedCol.getString(1));
@@ -563,6 +573,47 @@ public class ModelerService {
 					}
 				}catch(SQLException sqle){logger.error("Error contacting HSQLDB");}
 					
+				
+				//retrieving MDCollection with native MDFormat
+				try{
+					ResultSet resMdColNative =DBInterface.queryDB("select mdcollid from SELECTEDNATIVEMDFROMAT AS s where s.vreid='"+resourceID+"';");
+					while (resMdColNative.next()){
+						resItem= new ResourceItem();
+						resItem.setID(resMdColNative.getString(1));
+						System.out.println(resItem.getID());
+						resItem.setType(GCUBEMCollection.TYPE);
+						resItemList.add(resItem);
+					}
+				}catch(SQLException sqle){logger.error("Error contacting HSQLDB");}
+				
+				//retrieve and create MDCollection with Broker
+				try{
+					ResultSet resMdColDerivate =DBInterface.queryDB("select mdcollid, tpid from SELECTEDDERIVATEMDFROMAT AS s where s.vreid='"+resourceID+"';");
+					
+					MBrokerServiceHandler<String, Couple> sHandler= new MBrokerServiceHandler<String,Couple>(){
+						
+						@Override
+						protected String makeCall(MetadataBrokerPortType mbportType) throws Exception {
+							FindPossibleTransformationPrograms fptp= new FindPossibleTransformationPrograms();
+							Transform t= new Transform();
+							t.setTransformationProgramID(this.getParameter().tpID);
+							String toReturn= mbportType.transform(t);
+							return toReturn;
+						}
+					};
+					while (resMdColDerivate.next()){
+												
+					}
+					
+				}catch(SQLException sqle){logger.error("Error contacting HSQLDB");}
+				
+				
+				
+				//adding Services
+				ServiceList sl = new ServiceList();
+				
+				
+				
 				/*
 				ResultSet resRelatedMetadataCol =DBInterface.queryDB("select VRERELATEDCOLLECTION.collid from DLRELATEDCOLLECTION where VRERELATEDCOLLECTION.dlid='"+getResource().getId()+"';");
 				while (resRelatedCol.next()){
@@ -675,9 +726,24 @@ public class ModelerService {
 	 */
 
 
-}
+	}
 
-	
+	/**
+	 * inner class for couple
+	 * @author lucio
+	 *
+	 */
+	public class Couple{
+		
+		public String collectioID;
+		public String tpID; 
+		
+		public Couple(String collid, String tpid){
+			this.collectioID=collid;
+			this.tpID= tpID;
+		}
+		
+	}
 
 
 }
diff --git a/src/org/gcube/vremanagement/vremodeler/impl/util/XMLUtil.java b/src/org/gcube/vremanagement/vremodeler/impl/util/XMLUtil.java
index fae7d05..6af06f5 100644
--- a/src/org/gcube/vremanagement/vremodeler/impl/util/XMLUtil.java
+++ b/src/org/gcube/vremanagement/vremodeler/impl/util/XMLUtil.java
@@ -169,7 +169,9 @@ public class XMLUtil {
 						temp.append("</Id><Selectable>True</Selectable><Selected>False</Selected></MetadataFormat>");
 				}
 				//logger.debug("MDFProva: "+keyTemp+" "+temp);
-				if(MDFHash.get(keyTemp.toString())!=null) MDFHash.get(keyTemp).add(temp.toString());
+				
+								
+				if(MDFHash.contains(keyTemp.toString())) MDFHash.get(keyTemp.toString()).add(temp.toString());
 				else{
 					tempArray=new ArrayList<String>();
 					tempArray.add(temp.toString());
@@ -199,7 +201,7 @@ public class XMLUtil {
 						temp.append("</Id><Selectable>True</Selectable><Selected>False</Selected></MetadataFormat>");
 				}
 				//logger.debug("MDFProva: Derivable "+keyTemp+" "+temp);
-				if(MDFHash.get(keyTemp.toString())!=null) MDFHash.get(keyTemp.toString()).add(temp.toString());
+				if(MDFHash.contains(keyTemp.toString())) MDFHash.get(keyTemp.toString()).add(temp.toString());
 				else{
 					tempArray=new ArrayList<String>();
 					tempArray.add(temp.toString());
@@ -207,7 +209,10 @@ public class XMLUtil {
 				}
 			}
 			
-		}catch(SQLException e){//logger.error("database error");
+		}catch(SQLException e){logger.error("hsqldb error");
+			e.printStackTrace();
+		}catch(Exception e){
+			e.printStackTrace();
 		}
 		
 		StringBuilder resultString= new StringBuilder();
@@ -350,7 +355,6 @@ public class XMLUtil {
 		}
 		
 		toReturn.append("</Resultset>");
-		System.out.println(toReturn);
 		return toReturn.toString();
 	}