e="color: #a020f0;">case</span> (MPI_UNEQUAL)
     <span style="color: #b22222;">! </span><span style="color: #b22222;">Big mess</span>
     <span style="color: #a020f0;">call</span> <span style="color: #0000ff;">die</span>(<span style="color: #8b2252;">"Incompatible distribution reference communicators"</span>)
  <span style="color: #a020f0;">end select</span>

  <span style="color: #b22222;">! </span><span style="color: #b22222;">Now check congruence with the provided bridge_comm</span>

  <span style="co