MPI process limit

[garcs2]

Hello,

I am running SC as a subapp in a Griffin-HTM-SC coupled scheme. When I try running SC via Griffin I get the following error:

�[36mGriffin_htm0_sc0: �[31m*** ERROR ***
�[36mGriffin_htm0_sc0: �[31m/home/garcsamu/Serpent/SNAP-REACTORS-PRIVATE/snapReactors/reactor_models/Wet_Experiment_Models/standard_conditions/sc_test/pow_den/sc_core.i:168.1:
�[36mGriffin_htm0_sc0: �[31mThe following error occurred in the Problem 'MOOSE Problem' of type TriSubChannel1PhaseProblem.
�[36mGriffin_htm0_sc0: �[31m
�[36mGriffin_htm0_sc0: �[31mCannot use more than one MPI process.�[39m
�[36mGriffin_htm0_sc0: �[39m
�[36mGriffin_htm0_sc0: �[39m
�[36mGriffin_htm0_sc0: �[39m�[31m

My question is, if there is a way around this? Could I use more than one MPI process for the Griffin-HTM portion and then when the problem gets to SC I utilize one MPI process. I would appreciate any recommendations or suggestions. As it stands SC is the fastest portion of the simulation so only using one MPI process for the entire simulation is a big bottleneck.

[GiudGiud]

set max_procs_per_app = 1 in the SCM multiapps block, then you can use more processes in the parent app than in the child app