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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Dear Gaters.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>I run a simulation which produces a root file of
about 320MB, that contains about 90k coincidences from PET scanner and there
are 36M decays processed and the simulation ends normally. I can run a
benchmarkPET.C file with root on it, and I get sensible results of analysis
within about 20s. That indicates that root file is fine. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>However when I open root and TBrowser t on the same
root file, I can see the structure and leaves, but when I try to open a
histogram (double click on a leave) nothing happens even after a few minutes. Root
does not report any error and I can browse the tree normally. With a file up to
few tens of MB there was no problem with viewing histograms, and they appear
within few seconds maximum. I have a system with 1GB of RAM.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Any idea what is going on?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoAutoSig><st1:PersonName ProductID="Marcin Balcerzyk" w:st="on"><font
size=2 face=Verdana><span lang=ES-TRAD style='font-size:10.0pt;font-family:
Verdana'>Marcin Balcerzyk</span></font></st1:PersonName><span lang=ES-TRAD><o:p></o:p></span></p>
<p class=MsoAutoSig><font size=2 face=Verdana><span lang=ES-TRAD
style='font-size:10.0pt;font-family:Verdana'>Univesrsitad Complutense de Madrid<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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