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[Nolan Dyck <ndyck@xxxxxx>]

Thanks for the tip! It works now.

Might it be nice to mention this in the error message? You could print
something like "Do not import qt when running in batch mode."

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https://bugs.launchpad.net/bugs/1241817

Title:
  yade batch mode fails

Status in Yet Another Dynamic Engine:
  New

Bug description:
  when I try to run yade in batch mode it always fails, giving the error
  in a log file:

  Welcome to Yade 2013-10-16.git-fe8b27e 
  TCP python prompt on localhost:9000, auth cookie `kasdys'
  Warning: no X rendering available (see https://bbs.archlinux.org/viewtopic.php?id=13189)
  XMLRPC info provider on http://localhost:21000
  Running script ../periodic-sphere.py
  Traceback (most recent call last):
    File "/usr/local/bin/yade-2013-10-16.git-fe8b27e", line 174, in runScript
      execfile(script,globals())
    File "../periodic-sphere.py", line 1, in <module>
      from yade import pack,export,utils,plot,qt
    File "/usr/local/lib/i386-linux-gnu/yade-2013-10-16.git-fe8b27e/py/yade/qt/__init__.py", line 3, in <module>
      if not yade.runtime.hasDisplay: raise ImportError("Connecting to DISPLAY at Yade startup failed, unable to activate the qt4 interface.")
  ImportError: Connecting to DISPLAY at Yade startup failed, unable to activate the qt4 interface.

  =================== JOB SUMMARY ================
  id      : Row=0,numSpheres=100,REVL=0.636621,Save=1
  status  : 256 (FAILED)
  duration: 00:00:00
  command : YADE_BATCH=initparam.table:2 DISPLAY=  /usr/local/bin/yade-2013-10-16.git-fe8b27e --threads=1 --nice=10 -x ../periodic-sphere.py> ../periodic-sphere.py.Row=0,numSpheres=100,REVL=0.636621,Save=1.log 2>&1
  started : Fri Oct 18 16:11:49 2013
  finished: Fri Oct 18 16:11:49 2013

  -----------------------------------------------------------------------------------

  I am inline with the github revision
  5aa3f6f4856958a2062a0b8f0558857e86ee8a50 (Oct 16). The suggested
  ArchLinux link is dead.

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