Simulation gets stuck for larger genbox meshes

[makrandak]

Hello,

I am trying to run a lower-order simulation (order 3), and I created a 72x144x72 mesh using genbox. 7th-order cases with a lower number of elements are producing highly oscillatory statistics (mesh-to-mesh oscillations, especially for terms with derivatives).
This case involves finite viscosity (0.0075), and I don't want to use any filtering and LES (this needs to be purely DNS for precise budget calculations).
When I start the simulation, it gets stuck on

PARRSB_RSB_TOL = 0.000010
PARRSB_RSB_MG_GRAMMIAN = 0
PARRSB_RSB_MG_FACTOR = 2
load_balance: nelg = 746496
load_balance: unit_size = 112 (rsb = 112, rcb = 48)
initialize_levels: num_nodes = 4, num_ranks_per_node = 48
initialize_levels: levels = 2
parrsb_part_mesh_v0: levels requested = 2, levels enabled = 2
parrsb_part_mesh_v0: running partitioner ...
rsb: Level=1/2 number of cuts = 2
rsb: Level=2/2 number of cuts = 6
parrsb_part_mesh_v0: restore original input
parRSB finished in 2.51483 seconds.

I think it is getting stuck at reading the mesh (looking at output from other simulations)

Is there a way or setting to help get around this issue?