From: Axel Kohlmeyer (
Date: Wed Aug 21 2013 - 19:46:26 CDT

On Wed, Aug 21, 2013 at 11:18 PM, Holden Ranz <> wrote:
> Hello,
> I am new to VMD and have installed vmd 1.8.7 OpenGL on my windows 7 32-bit
> OS (tried using 1.9.1, but Nvidia driver is 189 series so not suitable). PDB
> and LAMMPS trajectory files load fine, but when I go to load a .xtc file the
> screen appears blank.

this is because .xtc files only contain coordinates and thus VMD has
no idea how to represent them. have a closer look at the main window
and you should see that there are frames loaded, only that no
representation is created. if you load a matching .pdb or .gro file,
you should see something.


> I get the following output when trying to load the file:
> Info) VMD for WIN32, version 1.8.7 (August 1, 2009)
> Info)
> 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: 928MB (45%)
> Info) OpenGL renderer: GeForce 310M/PCI/SSE2
> Info) Full GLSL rendering mode is available.
> Info) Textures: 2-D (8192x8192), 3-D (2048x2048x2048), Multitexture (4)
> Info) Spaceball driver not installed. Spaceball interface disabled.
> Info) No joysticks found. Joystick interface disabled.
> Found 68 plugins or data handlers in directory
> 'C:/Program Files/University of Illinois/VMD/plugins/WIN32/molfile'.
> vmd > Info) Using plugin xtc for coordinates from file
> C:/Users/Holden/Documents
> /Computing/Martini/lipid-tutorial/bilayer-analysis/dspc/traj.xtc
> Info) Finished with coordinate file
> C:/Users/Holden/Documents/Computing/Martini/
> lipid-tutorial/bilayer-analysis/dspc/traj.xtc.
> The file is from a gromacs coarse-grained simulation of dspc lipid bilayer.
> Can you guys please help me figure out what might be the problem? Thanks so
> much!
> Holden
> --
> Holden T. Ranz
> Graduate Student
> Department of Chemical Engineering & Materials Science
> University of California, Davis

Dr. Axel Kohlmeyer
International Centre for Theoretical Physics, Trieste. Italy.