In xData when reading mesh things are :
- if sequential name corespond to a file, proc O read this files and the others do nothing
- if sequential name does not corespond to any files, distributed name is tried. The idear is then that if no file correspond for a proc, an empty mesh is created. In this way a mesh distributed on 3 files will potentially be read by 3 proc only, the others proc simply creating empty mesh. Loadbalancing planned to equilibrate mesh on all proc aftewards.