diff --git a/src/org/gcube/vremanagement/vremodeler/db/IStoDBUtil.java b/src/org/gcube/vremanagement/vremodeler/db/IStoDBUtil.java
index ef59bfd..fdab6d9 100644
--- a/src/org/gcube/vremanagement/vremodeler/db/IStoDBUtil.java
+++ b/src/org/gcube/vremanagement/vremodeler/db/IStoDBUtil.java
@@ -164,7 +164,7 @@ public class IStoDBUtil {
 		try{
 			if (queryClient==null) queryClient= GHNContext.getImplementation(ISClient.class);
 		    GCUBECollectionQuery query= queryClient.getQuery(GCUBECollectionQuery.class);
-		    query.addGenericCondition("$result/Profile/IsUserCollection/string(@value) eq 'true']");
+		    query.addGenericCondition("$result/Profile/IsUserCollection/string(@value) eq 'true'");
 		    collectionList= queryClient.execute(query, scope);
 		    System.out.println("collections "+ collectionList.size());
 		}catch(Exception e ){logger.error("Error queryng IS"); throw new GCUBEFault(e); }