$ mpirun -np 4 ./ex2p -m ../beam-tet.mesh -sr 0 -sp 2 -no-vis

Produced with mfem-4.4 (https://github.com/mfem/mfem/archive/refs/tags/v4.4.tar.gz)

Options used:
   --mesh ../beam-tet.mesh
   --order 1
   --serial_ref 0
   --parallel_ref 2
   --amg-for-systems
   --no-static-condensation
   --no-visualization
   --by-vdim
   --device cpu
Device configuration: cpu
Memory configuration: host-std
Number of finite element unknowns: 2475
Assembling: r.h.s. ... matrix ... done.
Size of linear system: 2475