diff --git a/src/main/java/org/gcube/vomanagement/usermanagement/impl/LiferayGroupManager.java b/src/main/java/org/gcube/vomanagement/usermanagement/impl/LiferayGroupManager.java
index 0cd4160..32ffcad 100644
--- a/src/main/java/org/gcube/vomanagement/usermanagement/impl/LiferayGroupManager.java
+++ b/src/main/java/org/gcube/vomanagement/usermanagement/impl/LiferayGroupManager.java
@@ -283,6 +283,7 @@ public class LiferayGroupManager implements GroupManager {
 	 */
 	@Override
 	public long getGroupIdFromInfrastructureScope(String scope) throws IllegalArgumentException, UserManagementSystemException, GroupRetrievalFault {
+		_log.debug("called getGroupIdFromInfrastructureScope on " + scope);
 		if (! scope.startsWith("/")) {
 			throw new IllegalArgumentException("Scope should start with '/' ->" + scope);
 		}
@@ -310,6 +311,7 @@ public class LiferayGroupManager implements GroupManager {
 			}
 		}
 		else if (splits.length == 4) {//is a VRE 
+			_log.debug("is a VRE scope " + scope);
 			long parentGroupId = getGroupId(splits[2]);
 			List<Group> vres = null;
 			try {
@@ -320,8 +322,11 @@ public class LiferayGroupManager implements GroupManager {
 				e.printStackTrace();
 			}
 			for (Group group : vres) {
-				if (group.getName().compareTo(splits[3])==0) 
-					return group.getGroupId();
+				if (group.getName().compareTo(splits[3])==0) {
+					long groupId = group.getGroupId();
+					_log.debug("groupId found: " + groupId);
+					return groupId;
+				}
 			}
 		}
 		return -1;