Hi Luis,
The problem is that your last event as an empty channel name (which is
stored in an old fashioned TLeafC class). ROOT was not protected against
this case and will be fixed very shortly.
As a work-around you need to skip the last entry in your file. I.e. do:
higgs->Draw("higgsmass",mc,"","",higgs->GetEntries()-1,0);
Cheers,
Philippe
-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Luiz Martins Mundim
Filho
Sent: Friday, December 13, 2002 1:45 PM
To: Philippe Canal
Cc: Roottalk
Subject: Re: [ROOT] [Fwd: tree->Draw segmentation violation]
I'm using version 3.03/09. I tried to send the root file in attachment
twice, but after 4 days, the message did not reach the mailing list, I
thought it was because some spam/virus protection at CERN. I will try to
send it again on the next message.
thanks
Luiz
Philippe Canal wrote:
>Hi Luis,
>
>You do not specify the version of ROOT and the platform you are using.
>Please send me your root file so that I can try to reproduce your problem.
>
>Cheers,
>Philippe
>
>-----Original Message-----
>From: owner-roottalk@pcroot.cern.ch
>[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Luiz Martins Mundim
>Filho
>Sent: Friday, December 13, 2002 11:43 AM
>To: Roottalk
>Subject: [ROOT] [Fwd: tree->Draw segmentation violation]
>
>
>
>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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