From: Robert Dagil (
Date: Fri Mar 18 2011 - 07:46:07 CDT


I've tried to install vmd-xplor, but I am having problems getting it to work. Apparently, it is a authentication problem, however, I have no clue how to solve it. I am running Xplor 2.27 and VMD-xplor 1.6 in 64 bit versions on a RHEL 6 system. The error I get is as follows:

Info) VMD for LINUXAMD64, version 1.8.7 (December 14, 2009)
Info) Email questions and bug reports to
Info) Please include this reference in published work using VMD:
Info) Humphrey, W., Dalke, A. and Schulten, K., `VMD - Visual
Info) Molecular Dynamics', J. Molec. Graphics 1996, 14.1, 33-38.
Info) -------------------------------------------------------------
Info) Multithreading available, 4 CPUs detected.
Info) Free system memory: 2869MB (78%)
Warning) Detected X11 'Composite' extension: if incorrect display occurs
Warning) try disabling this optional X server feature.
Warning) Simple graphics mode: OpenGL 1.0, no extensions
Info) OpenGL renderer: Quadro NVS 290/PCI/SSE2
Info) Features:
Info) GLSL rendering mode is NOT available.
Found 1 plugins or data handlers in directory
Name C silver
Type C silver
Element C silver
Restype Polar silver
Restype Nonpolar green
exec rxvt -title xplor-0 -geometry +0-0 -e pty-xplor -termport 3369 & vmd > SSStream::SSStream: connecting to localhost on port 3368...
connection sock11 from port 47991
display: unix:0.0
host: localhost.localdomain
network display: :0.0
SSStream: failed to find cookie: /sbinlab2/rod/software/xplor-nih-2.27/bin/findXcookie: could not find cookie for display :0.0 Please see the notes on authentication.

Thanks for you help in advance...

Best regards

Robert Dagil
Ph.d. studerende

Københavns Universitet
Biologisk Institut
Ole Maaløes Vej 5
DK-2200 København N