To Whom it May Concern,
I have recently been encountering a problem when I
attempt to analyze ROOT chains.
This only happens when I attempt to analyze chains that
are composed of large files (~gByte) so that the total
chain is on the order of a few gBytes. I am using ROOT version
3.00/02 and am running it on a VA Linux machine running
RedHat 6.1.
What typically happens is that when I am waiting for a
'chain.Draw' command to be enacted, the canvas disappears. Then
I get an error in the ROOT window that says
--------------------------------------------
root [16] chain.Draw("mom:emctc>>h2",c2&&c3&&c4&&c5&&c6&&c7&&c8&&c12);
<TCanvas::MakeDefCanvas>: created default TCanvas with name c1
*** Break *** write on a pipe with no one to read it
Error in <RootX11IOErrorHandler>: fatal X11 error (connection to server lost?!)
**** Save data and exit application ****
--------------------------------------------
What I have done to get around this problem is to split the
files being analyzed into smaller chains. However, this is a less
than optimal solution.
Has anybody else encountered this problem and if so, was anybody
successful is solving it?
Thanks in advance.
regards,
Lars
--
______________________________________
Lars Ewell
Brookhaven National Laboratory
PHENIX Group
Physics Dept. 510C
Upton, NY 11973
ewell@bnl.gov
Phone (631)344-7070
FAX (631)344-3253
www http://www.phenix.bnl.gov/~ewell
_____________________________________
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