"auto" does not name a type in RooFit

Roofit and RooStats
16

Let me explain what I did. The objects you are trying to put in the TLegend are produced by RootFit and their names are defined by Roofit. May be there is a clever to find these names automatically but to make it simpler, I just did a gPad->ls() after executing the macro to see what are the real names of these objects:

root [1] gPad->ls()
Canvas Name=c1 Title= Option=
 TCanvas fXlowNDC=0 fYlowNDC=0 fWNDC=1 fHNDC=1 Name= c1 Title=  Option=
  OBJ: TList	TList	Doubly linked list : 0
   TFrame  X1= 0.139000 Y1=0.000000 X2=0.159000 Y2=68.873708
   OBJ: TH1D	frame_7fb7abcf7d90	A RooPlot of "#it{#Deltam}" : 0 at: 0x7fb7abcf62e0
   OBJ: RooHist	h_data	Histogram of data_plot__deltaM_after_bcs : 0 at: 0x7fb7b8706ef0
   OBJ: RooCurve	pdf_Norm[deltaM_after_bcs]	Projection of two component model : 0 at: 0x7fb7b870f060
   OBJ: RooCurve	pdf_Norm[deltaM_after_bcs]_Comp[bkg]	Projection of two component model : 0 at: 0x7fb7b870fe80
   OBJ: TH1D	frame_7fb7abcf7d90	A RooPlot of "#it{#Deltam}" : 0 at: 0x7fb7abcf62e0
   OBJ: TLegend	TPave  	X1= 0.150750 Y1=54.238045 X2=0.156000 Y2=71.456472
root [2]
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