Element - wise solution in parallel

Question

I have an eigenvector solution eigvects from eigenvalue analysis. Now, I would like to do element wise operation with that vector. Following code works well for one process:

for i, cell in enumerate(cells(Omega)):
    # find element id
    cell_id = cell.index()
    # extract local displacement vector from local to global dof map
    eigvect_e = eigvects[-1, dofmap.cell_dofs(cell_id)].real
    ...

However, turn into parallel, the loop over cells fails due to mesh partition. How to correct the loop working in parallel?

Thank you