- This directory can contain many dictionary functions that are not
  readily handled without using OpenFOAM itself. This directory will
  normally also be missing all lagrangian fields.

  For many cases it is just easier to skip over it entirely.
  Note that the problems with handing dictionary functions does not
  really affect decomposed cases (since they are already expanded
  during the decomposePar stage), but the missing lagrangian fields
  can still be annoying.