Not possible to reload a field defined only on a sub-mesh

[jermuzet]

Example: For my 3D models, I try to make a coupling between several toolboxes to have the different physics solved one after the other:

• firstly, time, I use the thermoelectric toolbox and save the temperature and electric potential in h5,
• secondly, I use the cfpdes toolbox for magnetism. For this, I want to import the electric potential obtained previously to calculate the current density with.
  I use the same mesh for both, but the Air part is not used in the first thermoelectric step. The temperature and electric potential are saved in h5 on a sub-mesh and it's currently not possible to reload those fields in the second step.