diff --git a/src/common/m_mpi_common.fpp b/src/common/m_mpi_common.fpp
index c54568d27..1ba675345 100644
--- a/src/common/m_mpi_common.fpp
+++ b/src/common/m_mpi_common.fpp
@@ -265,6 +265,8 @@ contains
 
         allocate (gathered_vector(sum(recounts)))
         call MPI_GATHERV(my_vector, counts, mpi_p, gathered_vector, recounts, displs, mpi_p, root, MPI_COMM_WORLD, ierr)
+#else
+        gathered_vector = my_vector
 #endif
 
     end subroutine s_mpi_gather_data
@@ -373,6 +375,8 @@ contains
         integer :: ierr  !< Generic flag used to identify and report MPI errors
 
         call MPI_ALLREDUCE(var_loc, var_glb, 1, mpi_p, MPI_SUM, MPI_COMM_WORLD, ierr)
+#else
+        var_glb = var_loc
 #endif
 
     end subroutine s_mpi_allreduce_sum
@@ -440,6 +444,8 @@ contains
         integer :: ierr  !< Generic flag used to identify and report MPI errors
 
         call MPI_ALLREDUCE(var_loc, var_glb, 1, mpi_p, MPI_MIN, MPI_COMM_WORLD, ierr)
+#else
+        var_glb = var_loc
 #endif
 
     end subroutine s_mpi_allreduce_min
@@ -470,6 +476,8 @@ contains
         integer :: ierr  !< Generic flag used to identify and report MPI errors
 
         call MPI_ALLREDUCE(var_loc, var_glb, 1, mpi_p, MPI_MAX, MPI_COMM_WORLD, ierr)
+#else
+        var_glb = var_loc
 #endif
 
     end subroutine s_mpi_allreduce_max
diff --git a/src/pre_process/m_global_parameters.fpp b/src/pre_process/m_global_parameters.fpp
index b358516fb..130a25a0b 100644
--- a/src/pre_process/m_global_parameters.fpp
+++ b/src/pre_process/m_global_parameters.fpp
@@ -396,6 +396,7 @@ contains
             particle_cloud(i)%moving_ibm = 0
             particle_cloud(i)%seed = 0
             particle_cloud(i)%cloud_geometry = 1
+            particle_cloud(i)%shell_axis = 3
             particle_cloud(i)%packing_method = dflt_int
             particle_cloud(i)%periodic = 0
         end do
diff --git a/src/pre_process/m_mpi_proxy.fpp b/src/pre_process/m_mpi_proxy.fpp
index 6753d818c..592b2995b 100644
--- a/src/pre_process/m_mpi_proxy.fpp
+++ b/src/pre_process/m_mpi_proxy.fpp
@@ -147,6 +147,7 @@ contains
             call MPI_BCAST(particle_cloud(i)%moving_ibm, 1, MPI_INTEGER, 0, MPI_COMM_WORLD, ierr)
             call MPI_BCAST(particle_cloud(i)%seed, 1, MPI_INTEGER, 0, MPI_COMM_WORLD, ierr)
             call MPI_BCAST(particle_cloud(i)%cloud_geometry, 1, MPI_INTEGER, 0, MPI_COMM_WORLD, ierr)
+            call MPI_BCAST(particle_cloud(i)%shell_axis, 1, MPI_INTEGER, 0, MPI_COMM_WORLD, ierr)
             call MPI_BCAST(particle_cloud(i)%packing_method, 1, MPI_INTEGER, 0, MPI_COMM_WORLD, ierr)
             call MPI_BCAST(particle_cloud(i)%periodic, 1, MPI_INTEGER, 0, MPI_COMM_WORLD, ierr)
         end do
diff --git a/src/simulation/m_mpi_proxy.fpp b/src/simulation/m_mpi_proxy.fpp
index 71a13a139..8523bd338 100644
--- a/src/simulation/m_mpi_proxy.fpp
+++ b/src/simulation/m_mpi_proxy.fpp
@@ -149,9 +149,10 @@ contains
             #:endfor
         end do
 
-        ! manual: cfl_dt (runtime-computed logical), bc_io (BC-file existence)
+        ! manual: cfl_dt (runtime-computed logical), bc_io (BC-file existence), periodic_bc (from global BCs)
         call MPI_BCAST(cfl_dt, 1, MPI_LOGICAL, 0, MPI_COMM_WORLD, ierr)
         call MPI_BCAST(bc_io, 1, MPI_LOGICAL, 0, MPI_COMM_WORLD, ierr)
+        call MPI_BCAST(periodic_bc, 3, MPI_LOGICAL, 0, MPI_COMM_WORLD, ierr)
 
         ! manual: shear_stress, bulk_stress (derived from Re_size post-init on all ranks),
         !         bodyForces (derived from bf_x/y/z)