If you are using 
tcsh

setenv doublebufferflag 1

in bash

export doublebufferflag=1

-----------------------------------------------------------
Pedro Paulo de M. Oliveira Junior
Diretor de Operações
Netfilter & SpeedComm Telecom
--- Novo Netfilter 3.0 www.netfilter.com.br



On Wed, Apr 1, 2009 at 12:07, Elisa Dell'Oglio <delloglio@bwh.harvard.edu> wrote:
Hi all,

I am running freesurfer on CentOS (5.2-x86_64). I get the folowing error when I launch tksurfer:
surfer: ### redraw failed: no gl window open.
The result is that no surface is shown.

Any advice on how to solve the problem?

Thanks,
Elisa



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