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[Anders Logg <logg@xxxxxxxxx>]

Here's another problem I just ran into:

class BoundaryValue(Expression):
    def eval(self, values, x):
        values[0] = ...

This works:

  g = BoundaryValue(V)

or

  g = BoundaryValue(V=V)

But this does not work:

  g = BoundaryValue(element=element)

I get this error:

Exception: Swig director method error. Error detected when calling
'Expression.eval_data'

when calling bc.apply() with the above function as argument (which
results in a call to eval).

--
Anders

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