Problem with graphical cut TCutG

From: Georges Lobo (globo@freesurf.fr)
Date: Fri Mar 17 2000 - 15:26:21 MET 

Hi all,
I have a problem concerning use of graphical cuts.
I've plotted a 2D histogram, then using the editor I defined a graphical
cut. 
The first problem is that a double-click doesn't close the graph, I
usually have to click more than twice to effectivelly close it. 
When it is done I import the graphical cut by 

root[3] TCutG *protoncut = (TCutG*)gPad->GetPrimitive("CUTG"); 
root[4] protoncut->SetName("protoncut"); 

and if I try to use this cut with a plotting I obtained

root [5] h10->Draw("Ex:Ey>>hisde4","thp>0&&my==1&&protoncut","colz");
*ERROR 4 : 
 Empty String

*ERROR 4 : 
 Empty String
If I try it again I have no plot at all and no more error message. 
What does this mean ?

Thanks in advance for any help.

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