diff --git a/concessioni-lifecycle/src/main/java/org/gcube/application/cms/concessioni/plugins/SDIMaterializerPlugin.java b/concessioni-lifecycle/src/main/java/org/gcube/application/cms/concessioni/plugins/SDIMaterializerPlugin.java
index 764a573..a652246 100644
--- a/concessioni-lifecycle/src/main/java/org/gcube/application/cms/concessioni/plugins/SDIMaterializerPlugin.java
+++ b/concessioni-lifecycle/src/main/java/org/gcube/application/cms/concessioni/plugins/SDIMaterializerPlugin.java
@@ -16,6 +16,7 @@ import org.gcube.application.cms.plugins.reports.Report;
 import org.gcube.application.cms.plugins.requests.MaterializationRequest;
 import org.gcube.application.cms.serialization.Serialization;
 import org.gcube.application.geoportal.common.model.JSONPathWrapper;
+import org.gcube.application.geoportal.common.model.document.ComparableVersion;
 import org.gcube.application.geoportal.common.model.document.ProfiledDocument;
 import org.gcube.application.geoportal.common.model.document.filesets.RegisteredFileSet;
 import org.gcube.application.geoportal.common.model.profile.Field;
@@ -64,7 +65,7 @@ public class SDIMaterializerPlugin implements MaterializationPlugin {
         log.info("Materializer {} : Performing {} ",this.getDescriptor().getId(),request);
         ProfiledDocument profiledDocument=request.getDocument();
         Profile profile = request.getProfile();
-        Document configuration=request.getParameters();
+        Document requestArguments=request.getParameters();
         Document profileConfiguration =null;
         for (HandlerDeclaration h : profile.getHandlers()) {
             if (h.getId().equals("SDI-Default-Materializer")) {
@@ -77,26 +78,34 @@ public class SDIMaterializerPlugin implements MaterializationPlugin {
         log.debug("Profile Configuration is {} ",profileConfiguration);
         try{
             JSONPathWrapper documentNavigator=new JSONPathWrapper(profiledDocument.getTheDocument().toJson());
-            JSONPathWrapper profileNavigator=new JSONPathWrapper(profile.getSchema().toJson());
+            JSONPathWrapper schemaNavigator=new JSONPathWrapper(profile.getSchema().toJson());
 
-            for(Object fsConfigObj : configuration.get("registeredFileSetPaths", List.class)){
+            for(Object fsConfigObj : profileConfiguration.get("registeredFileSetPaths", List.class)){
                 log.debug("Managing {} ",fsConfigObj);
                 MaterializationConfig fsConfig=Serialization.convert(fsConfigObj,MaterializationConfig.class);
-                Field f = profileNavigator.getByPath(fsConfig.getSchemaField(), Field.class).get(0);
+                List<Field> matchingFieldDefinitions =schemaNavigator.getByPath(fsConfig.getSchemaField(), Field.class);
+                if(matchingFieldDefinitions==null || matchingFieldDefinitions.isEmpty())
+                    throw new MaterializationException("Invalid Field Definition path in configuration [NO MATCH] : "+
+                            fsConfig.getSchemaField());
+                if(matchingFieldDefinitions.size()>1)
+                    throw new MaterializationException("Invalid Field Definition path in configuration [MATCHES "+matchingFieldDefinitions.size()+"] : "+
+                            fsConfig.getSchemaField());
+
+                Field f = schemaNavigator.getByPath(fsConfig.getSchemaField(), Field.class).get(0);
 
                 // TODO Check if schema points to RegisteredFileSet
 
                 for(RegisteredFileSet fs : documentNavigator.getByPath(fsConfig.getDocumentPath(),RegisteredFileSet.class)){
                     log.debug("Found {} ",fs);
-                    configuration.putIfAbsent("basePersistencePath",profile.getId());
-                    configuration.putIfAbsent("documentID",profiledDocument.get_id());
-                    if(configuration.containsKey("titleField"))
-                        configuration.putIfAbsent("layerTitle",fs.getString(configuration.getString("titleField")));
-                    else configuration.putIfAbsent("layerTitle",fs.getUUID());
+                    requestArguments.putIfAbsent("basePersistencePath",profile.getId());
+                    requestArguments.putIfAbsent("documentID",profiledDocument.get_id());
+                    if(requestArguments.containsKey("titleField"))
+                        requestArguments.putIfAbsent("layerTitle",fs.getString(requestArguments.getString("titleField")));
+                    else requestArguments.putIfAbsent("layerTitle",fs.getUUID());
 
-                    RegisteredFileSet obtained = sdiManager.materializeLayer(fs,configuration);
+                    RegisteredFileSet obtained = sdiManager.materializeLayer(fs,requestArguments);
                     log.debug("Obtained {} ",obtained);
-                    documentNavigator.set("$..[?(@.uuid == "+fs.getUUID()+")]",obtained);
+                    documentNavigator.setElement("$..[?(@.uuid == "+fs.getUUID()+")]",obtained);
                 }
             }
 
@@ -116,8 +125,15 @@ public class SDIMaterializerPlugin implements MaterializationPlugin {
         }
     }
 
+    private static final PluginDescriptor DESCRIPTOR=new PluginDescriptor("SDI-Default-Materializer", PluginDescriptor.BaseTypes.MATERIALIZER);
+    static {
+        DESCRIPTOR.setDescription("SDI Materializer. " +
+                "This plugin materialize FileSets in gCube SDI.");
+        DESCRIPTOR.setVersion(new ComparableVersion("1.0.0"));
+    }
+
     @Override
     public PluginDescriptor getDescriptor() {
-        return null;
+        return DESCRIPTOR;
     }
 }