diff --git a/src/main/java/org/gcube/data/transfer/model/plugins/thredds/ThreddsInfo.java b/src/main/java/org/gcube/data/transfer/model/plugins/thredds/ThreddsInfo.java
index a18714c..25f331d 100644
--- a/src/main/java/org/gcube/data/transfer/model/plugins/thredds/ThreddsInfo.java
+++ b/src/main/java/org/gcube/data/transfer/model/plugins/thredds/ThreddsInfo.java
@@ -41,7 +41,7 @@ public class ThreddsInfo {
 	
 	
 	private static ThreddsCatalog findById(ThreddsCatalog catalog,String id) {
-		if(catalog==null||catalog.getID()==null||catalog.getID().equals(id)) return catalog;		
+		if(catalog!=null&&catalog.getID()!=null&&catalog.getID().equals(id)) return catalog;		
 		for(ThreddsCatalog cat : catalog.getSubCatalogs().getLinkedCatalogs())
 			return findById(cat,id);		
 		return null;