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[Amiya Prakash Das <1652529@xxxxxxxxxxxxxxxxxx>]

Thanks for coming back on the issue, i am using the latest capillary
files and Yade version-2016.06a. And moreover, i have directly taken the
script from the example folder in the github. Unfortunately it still
doesn't work with the same error. Can you tell me the version on which
the script and capillary files are compatible.

Thanks

Cheers
Amiya

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https://bugs.launchpad.net/bugs/1652529

Title:
  segmentation fault (core dumped)

Status in Yade:
  Invalid

Bug description:
  Hi I am trying to run this code, which is an example given in the
  package. But every time i try to execute this file, i get segmentation
  fault error. I am using Ubuntu 16.04 LTS and Yade 2016.06a

  
  #!/usr/bin/python
  # -*- coding: utf-8 -*-

  """
  To run this script you need to have all 10 text files from https://yade-dem.org/wiki/CapillaryTriaxialTest
  in the same folder as you run this script in console!

  This script shows how to use Law2_ScGeom_CapillaryPhys_Capillarity. The user can switch between hertz and 
  linear model by setting "model_type"
  """

  model_type              = 1     #1=Hertz model with capillary forces,
  else linear model with capillary model

  #some parameters:
  shear_modulus 	= 1e5
  poisson_ratio 	= 0.3
  young_modulus	= 2*shear_modulus*(1+poisson_ratio)
  friction		= 0.5
  angle			= atan(friction)
  local_damping 	= 0.01
  viscous_normal	= 0.021
  viscous_shear	= 0.8*viscous_normal
  lowercorner		= Vector3(0,0,0)
  uppercorner		= Vector3(0.002,0.002,0.004)

  #creating a material (FrictMat):
  id_SphereMat=O.materials.append(FrictMat(young=young_modulus,poisson=poisson_ratio,density=2500,frictionAngle=angle))
  SphereMat=O.materials[id_SphereMat]

  #generate particles:
  sp=pack.SpherePack()
  sp.makeCloud(lowercorner,uppercorner,.0002,rRelFuzz=.3)
  O.bodies.append([sphere(c,r,material=SphereMat) for c,r in sp])

  #generate boundary:
  O.bodies.append(geom.facetBox(uppercorner/2,uppercorner/2,wire=True,fixed=True,material=SphereMat))

  #define engines:
  if model_type == 1:#hertz model with capillary forces
  	O.engines=[
  		ForceResetter(),
  		InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]),
  		InteractionLoop(
  			[Ig2_Sphere_Sphere_ScGeom(),Ig2_Facet_Sphere_ScGeom()],
  			[Ip2_FrictMat_FrictMat_MindlinCapillaryPhys(label='ContactModel')],#for hertz model only
  			[Law2_ScGeom_MindlinPhys_Mindlin()]#for hertz model only
  		),
  		Law2_ScGeom_CapillaryPhys_Capillarity(capillaryPressure=10000),#for hertz model only
  		NewtonIntegrator(damping=local_damping,gravity=(0,0,-9.81)),
  	]
  	ContactModel.betan=viscous_normal
  	ContactModel.betas=viscous_shear
  	ContactModel.useDamping=True
  else:
  	O.engines=[
  		ForceResetter(),
  		InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]),
  		InteractionLoop(
  			[Ig2_Sphere_Sphere_ScGeom(),Ig2_Facet_Sphere_ScGeom()],
  			[Ip2_FrictMat_FrictMat_CapillaryPhys()],	#for linear model only
  			[Law2_ScGeom_FrictPhys_CundallStrack()],	#for linear model only
  		),
  		Law2_ScGeom_CapillaryPhys_Capillarity(capillaryPressure=10000),#for linear model only
  		NewtonIntegrator(damping=local_damping,gravity=(0,0,-9.81)),
  	]

  #set time step and run simulation:
  O.dt=0.5*PWaveTimeStep()

  from yade import qt
  qt.View()
  print('Press PLAY button')
  #O.run(10000,True)

  
  looking forward to hear soon..!!

  Cheers
  Amiya

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