Use mpi_communicator instead of MPI_COMM_WORLD.

diff --git a/examples/step-70/step-70.cc b/examples/step-70/step-70.cc
index d3e35dc9eca0a5fbf319b5f0ceeb88e148c46c6c..9ea88cc6e02f03156a8c95c6b962a0057e9e63ba 100644 (file)
--- a/examples/step-70/step-70.cc
+++ b/examples/step-70/step-70.cc
@@ -910,7 +910,7 @@ namespace Step70
 
     // and gather the information from all participating processes
     global_fluid_bounding_boxes =
-      Utilities::MPI::all_gather(MPI_COMM_WORLD, local_boxes);
+      Utilities::MPI::all_gather(mpi_communicator, local_boxes);
 
 
     // Finally generate the particles from the support points of the