diff --git a/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/CkanToZendoPublisherWidget.java b/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/CkanToZendoPublisherWidget.java
index 46746cd..a4b9b72 100644
--- a/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/CkanToZendoPublisherWidget.java
+++ b/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/CkanToZendoPublisherWidget.java
@@ -154,7 +154,7 @@ public class CkanToZendoPublisherWidget {
 					if(!isValid)
 						allFormsAreValid = false;
 				}
-				
+								
 				if(allFormsAreValid) {
 					buttonPublish.setEnabled(false);
 					basicTabPanel.getElement().getStyle().setOpacity(0.5);
diff --git a/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/ui/authors/CreatorsFormView.java b/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/ui/authors/CreatorsFormView.java
index 9a17516..7821871 100644
--- a/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/ui/authors/CreatorsFormView.java
+++ b/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/ui/authors/CreatorsFormView.java
@@ -176,7 +176,8 @@ public class CreatorsFormView extends Composite implements FormValidator{
 		if(userRole.compareToIgnoreCase(ZenodoContributor.USER_ROLE)==0) {
 			author = new ZenodoContributor();
 			((ZenodoContributor) author).setType(contributorTypeValues);
-		}
+		}else
+			author = new ZenodoCreator();
 			
 		CreatorView view = new CreatorView(author, userRole, eventBus,false);
 		listCreatorView.add(view);
@@ -206,7 +207,7 @@ public class CreatorsFormView extends Composite implements FormValidator{
 	 */
 	public List<? extends ZenodoAuthor> readListOfCreatorsFromView(){
 		
-		List<ZenodoAuthor> listAuthors = new ArrayList<>(listCreatorView.size());
+		List<ZenodoAuthor> listAuthors = new ArrayList<>();
 		
 		for (CreatorView creatorView : listCreatorView) {
 			ZenodoAuthor author = creatorView.getAuthor();
@@ -227,6 +228,7 @@ public class CreatorsFormView extends Composite implements FormValidator{
 				GWT.log("The fielName is null or empty skpping he/she from list of Authors");
 		}
 		
+		GWT.log("returning list of authors: "+listAuthors);
 		return listAuthors;
 	}
 
diff --git a/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/ui/basicinformation/BasicInformationView.java b/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/ui/basicinformation/BasicInformationView.java
index 69d705a..da36fbb 100644
--- a/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/ui/basicinformation/BasicInformationView.java
+++ b/src/main/java/org/gcube/portlets/widgets/ckan2zenodopublisher/client/ui/basicinformation/BasicInformationView.java
@@ -554,6 +554,9 @@ public class BasicInformationView extends Composite implements FormValidator {
 	 */
 	public List<ZenodoCreator> getListOfCreators() {
 		List<ZenodoCreator> listOfCreators = new ArrayList<>();
+		if(listOfCreatorsView==null) {
+			return listOfCreators;
+		}
 		for (CreatorsFormView cfv : listOfCreatorsView) {
 			List<? extends ZenodoAuthor> listOfUsers = cfv.readListOfCreatorsFromView();
 			for (ZenodoAuthor zenodoAuthor : listOfUsers) {
@@ -570,11 +573,15 @@ public class BasicInformationView extends Composite implements FormValidator {
 	 */
 	public List<ZenodoContributor> getListOfContributors() {
 		List<ZenodoContributor> listOfContributors = new ArrayList<>();
+		if(listOfContributorsView==null) {
+			return listOfContributors;
+		}
 		for (CreatorsFormView cfv : listOfContributorsView) {
 			List<? extends ZenodoAuthor> listOfUsers = cfv.readListOfCreatorsFromView();
 			for (ZenodoAuthor zenodoAuthor : listOfUsers) {
 				listOfContributors.add((ZenodoContributor) zenodoAuthor);
 			}
+		
 		}
 		return listOfContributors;
 	}