diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/RetrieveChartFileServlet.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/RetrieveChartFileServlet.java
index bd43d5d..fb4d3cb 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/RetrieveChartFileServlet.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/RetrieveChartFileServlet.java
@@ -65,8 +65,8 @@ public class RetrieveChartFileServlet extends HttpServlet {
 					+ session.getId());
 
 			SessionUtil.getAslSession(session);
-			String uri = (String) request.getAttribute(ATTRIBUTE_STORAGE_URI);
-			logger.debug("Request storage uri:"+uri);
+			String uri = (String) request.getParameter(ATTRIBUTE_STORAGE_URI);
+			logger.debug("Request storage uri: "+uri);
 			
 			if(uri==null|| uri.isEmpty()){
 				logger.error("Error getting request uri: "