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[Johannes Ring <question143060@xxxxxxxxxxxxxxxxxxxxx>]

Question #143060 on DOLFIN changed:
https://answers.launchpad.net/dolfin/+question/143060

    Status: Open => Answered

Johannes Ring proposed the following answer:
Are you using the Ubuntu packages from the PPA? If so, try to replace
the 'value_shape' method starting at line 21 with this:

  def dim(self):
          return 2

This is needed because the PPA contains the latest stable release of
DOLFIN (version 0.9.9), while the documentation on the web page (where I
assume you got demo2.py) is following the development version.

You also probably need to select quadrature representation in the form
compiler options:

  parameters["form_compiler"]["representation"] = "quadrature"

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