### Problem with visualization of Results in PARAVIEW

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Hi

I have problem with visualizing the results in Paraview. I want to solve an equation in a part of my domain (NOT the whole domain).

I have problem with visualizing the results in Paraview. I want to solve an equation in a part of my domain (NOT the whole domain).

```
F = dot(grad(PHI), grad(v_4)) * dx(2)+...
n = File("PHI.pvd")
while t <= T:
J = derivative(F, z, dz)
problem = NonlinearVariationalProblem(F, z, bcs, J)
solver = NonlinearVariationalSolver(problem)
solver.solve()
t += dt
n << PHI
```

The problem is when I want to see the results in Paraview I get this error:```
ERROR: In /build/paraview-arsa8T/paraview-5.0.1+dfsg1/VTK/IO/XML/vtkXMLDataReader.cxx, line 449
vtkXMLUnstructuredGridReader (0x424c6b0): Cannot read point data array "f_7-3" from PointData in piece 0. The data array in the element may be too short.
```

The thing is when I solve the same equation in the whole domain (**Using dx instead of dx(2)**) the file is opened perfectly! Does anybody know of any solution for this weird problem?

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