Hello,

I am trying to use the FEFieldFunction class to evaluate my finite element 
solution at a predefined set of points inside my computational domain.
In my code, I include 

#include <numerics/fe_field_function.h>

and then build the object

FEFieldFunction<dim> field_function(dof_handler, solution).

However, the compiler complains that I have not previously defined 
FEFieldFunction:

myfile.h In member function ‘void DGMethod<dim>::record_observations(....)’:
myfile.h:1318: error: ‘FEFieldFunction’ was not declared in this scope

and a few related errors follow. I found the definition of FEFieldFunction 
class inside "numerics/fe_field_function.h" - shouldn't that include be 
sufficient?
What gives? Do I need to include some other code?

Thanks,
Mihai

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