Solver hangs when MPI is running simultaneously

Dear developers,

When my program is coupled with dealii, when one uses mpi and one doesn’t, it can be calculated without any problem. But when I use mpi at the same time, it hangs.

Also I tested multiple nodes also not able to pass data, it seems like they can’t find each other. Below is my config file and the file for the commit command.

precice-config.xml (2.8 KB)
new.txt (1.3 KB)
sub.txt (798 Bytes)