Yade simulation python script wont start using xrdp (remote access)

I guess you don't have support for GL display through your remote access (or, simply, there is no openGL on the server).
Trying running with "yade -n script.py" (see "yade -h" for the launch options).

thanks, that will help a lot. openGL is installed on the server, because you can use yade with graphics if you directly operate it without remote access.
I hope, that it will be possible to use vtkrecorder during simulation. this way i should be able to look at particle movement after finishing simulation and transferring the data via network to my desktop computer, on which paraview would be installed.

hmm, I tried using the vtkrecorder. but it doesnt work as expected.
As a tets I used the 3D Postprocessing example. But because i have to use the "-n" mode - i cant use the qt-parts of the tutorial. At least I think so.
If possible I would love to create a video from simulation but if I get the example right, for recording a mpeg video, i need to explicitly open qt.view() but this of course end up in error messages because there is no display environment variable.

I ended up using this code:

# demonstrate 3d postprocessing with yade
#
# 1. qt.SnapshotEngine saves images of the 3d view as it appears on the screen periodically
# utils.makeVideo is then used to make real movie from those images
# 2. VTKRecorder saves data in files which can be opened with Paraview
# see the User's manual for an intro to Paraview

# generate loose packing
from yade import pack
sp=pack.SpherePack()
sp.makeCloud((0,0,0),(2,2,2),rMean=.1,rRelFuzz=.6,periodic=True)
# add to scene, make it periodic
sp.toSimulation()

O.engines=[
   ForceResetter(),
   InsertionSortCollider([Bo1_Sphere_Aabb()]),
   InteractionLoop(
      [Ig2_Sphere_Sphere_L3Geom()],
      [Ip2_FrictMat_FrictMat_FrictPhys()],
      [Law2_L3Geom_FrictPhys_ElPerfPl()]
   ),
   NewtonIntegrator(damping=.4),
   # save data for Paraview
   VTKRecorder(fileName='3d-vtk-',recorders=['all'],iterPeriod=1),
]
O.dt=.5*utils.PWaveTimeStep()

# prescribe constant-strain deformation of the cell
O.cell.velGrad=Matrix3(-.1,0,0, 0,-.1,0, 0,0,-.1)

executing it via
# yade-daily -n -j2 3DPostprocessing.py
nothing happens. I expected some files being produced but nohting happens.

Could you please help me?

There is no "run()" in the script, it could explain why you get nothing.

you're absolutely right, thank you.
I just added the following line of code to the .py script

# start simulation without using qt.controller()
O.run()

Hi there,
just want to add a detail. I encountered the same problem again some time ago. "Xlib.xauth: warning, no xauthority details available"
This error message is caused by a missing xauthority file on your computer system and results in yade that will be run without graphics (-n option)
It is sufficient to touch this file
so typing in terminal
    touch ~/.Xauthority
will solve the problem and you can use yade in graphics mode.

I think that this problem is really rare but maybe someone else can be helped with that.
My operating system is Ubuntu 14.04 LTS 64bit.