diff --git a/ostap/fitting/dataset.py b/ostap/fitting/dataset.py
index feb12837..5fcc40c5 100644
--- a/ostap/fitting/dataset.py
+++ b/ostap/fitting/dataset.py
@@ -1709,11 +1709,12 @@ def _rds_makeWeighted_ ( dataset           ,
     varset = dataset.get()
     if ( 6, 18 ) <= root_info < ( 6 , 20 ) :
         print ( 'SPECIAL TRATMENT!' , root_info ) 
-        args = dsID() , dataset.GetTile() , varset, ROOT.RoofitWeightVar ( weightvar ) 
+        args = dsID() , dataset.GetTitle() , varset, ROOT.Roofit.WeightVar ( weightvar ) 
         if cuts : args + ( ROOT.RooFit.Cut ( cuts ) )
         result = ROOT.RooDataSet ( *args )
         for entry, w in dataset :
             weight = entry [ weightvar ]
+            print ( 'add entry' , [ v.name for v in entry ] , weight )
             result.add ( entry , float ( weight ) )        
         return result