[ROOT] [Fwd: tree->Draw segmentation violation]

From: Luiz Martins Mundim Filho (mundim@uerj.br)
Date: Fri Dec 13 2002 - 18:42:53 MET


I sent this email twice days ago, but I don't know why, it doesn't get
into the mailling list... maybe it is because the attachments. Lets try to
solve this without them.


-------------------------------------------------------------------------------------

Hi Rooters

I've got a strange problem. I have a simple tree and need to plot one 
variable with some cuts. I used to do
root> .x cuts.C
root>higgs->Draw("higgsmass",mc)

So far, it goes fine, but if I try to plot either the same plot 
(with exactly the same command) or a new one, I got
a segmentation violation. The crash doen't occurs if I don't use cuts.

I could not send the tree (it is a small file), but I included a 
print of it. The file cuts.C just 
define what is MC (signal+background), signal and data.

Thanks for any help.

Luiz

The file "cuts.C" is below:

{
TCut signal = "strstr(channel,\"higs\")*scaling";
TCut data   = "strstr(channel,\"data\")";
TCut backg  = !data*"(!strstr(channel,\"higs\"))*scaling";
TCut mc     = "(!strstr(channel,\"data\"))*scaling";
}


root [1] higgs->Print()
******************************************************************************
*Tree    :higgs     : Masses from Higgs3fit                                  *
*Entries :     6451 : Total =          499021 bytes  File  Size =      67736 *
*        :          : Tree compression factor =   1.00                       *
******************************************************************************
*Br    0 :irun      : irun/I                                                 *
*Entries :     6451 : Total  Size=      38196 bytes  File Size  =          0 *
*Baskets :        0 : Basket Size=      32000 bytes  Compression=   1.00     *
*............................................................................*
*Br    1 :ievt      : ievt/I                                                 *
*Entries :     6451 : Total  Size=      38196 bytes  File Size  =          0 *
*Baskets :        0 : Basket Size=      32000 bytes  Compression=   1.00     *
*............................................................................*
*Br    2 :cms       : cms/I                                                  *
*Entries :     6451 : Total  Size=      38190 bytes  File Size  =          0 *
*Baskets :        0 : Basket Size=      32000 bytes  Compression=   1.00     *
*............................................................................*
*Br    3 :channel   : channel/C                                              *
*Entries :     6451 : Total  Size=     134761 bytes  File Size  =          0 *
*Baskets :        2 : Basket Size=      32000 bytes  Compression=   1.00     *
*............................................................................*
*Br    4 :chrec     : chrec/C                                                *
*Entries :     6451 : Total  Size=     134741 bytes  File Size  =          0 *
*Baskets :        2 : Basket Size=      32000 bytes  Compression=   1.00     *
*............................................................................*
*Br    5 :higgsmass : higgsmass/F                                            *
*Entries :     6451 : Total  Size=      38226 bytes  File Size  =          0 *
*Baskets :        0 : Basket Size=      32000 bytes  Compression=   1.00     *
*............................................................................*
*Br    6 :eemass    : eemass/F                                               *
*Entries :     6451 : Total  Size=      38208 bytes  File Size  =          0 *
*Baskets :        0 : Basket Size=      32000 bytes  Compression=   1.00     *
*............................................................................*
*Br    7 :scaling   : scaling/F                                              *
*Entries :     6451 : Total  Size=      38214 bytes  File Size  =          0 *
*Baskets :        0 : Basket Size=      32000 bytes  Compression=   1.00     *
*............................................................................*



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