Hi Mohammad,

This error typically indicates that the PyMOL installation interferes with a 
different Qt installation on your system. I though we have this under control, 
our launcher script unsets all (known) interfering environment variables.

Can you check which Qt environment variables are set on your system? Type this 
into a terminal:

  env | grep QT

Our libraries should also be unaffected by LD_LIBRARY_PATH, but just in case, 
can you also check:

  env | grep LD

For your information, libqxcb should be picked up from 
pymol/plugins/platforms/libqxcb.so, not from 
/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so

Cheers,
  Thomas

> On Jul 4, 2018, at 9:39 PM, Mohammad T Mazhab Jafari <mazha...@gmail.com> 
> wrote:
> 
> Hello,
> 
> I am trying to run pymol on my linux computer (Ubuntu 17.10).
> 
> I downloaded PyMOL-2.1.1_0-Linux-x86_64.tar.bz2
> 
> then unpacked with
> 
> tar -jxf PyMOL-2.1.1_0-Linux-x86_64.tar.bz2
> 
> When I try to execute pymol from the pymol folder, I get the following 
> message.
> 
> This application failed to start because it could not find or load the Qt 
> platform plugin "xcb"
> in "".
> Available platform plugins are: eglfs, minimal, minimalegl, offscreen, xcb.
> Reinstalling the application may fix this problem.
> Abort (core dumped)
> 
> I have libqxcb,
> 
> locate libqxcb
> /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
> /usr/lib/x86_64-linux-gnu/qt5/plugins/xcbglintegrations/libqxcb-egl-integration.so
> /usr/lib/x86_64-linux-gnu/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
> 
> 
> Any idea how to solve this issue?
> 
> Thanks.
> M.

--
Thomas Holder
PyMOL Principal Developer
Schrödinger, Inc.


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