Running

The input file specified on the command line is a free-format text file, one entry per row, that specifies input data processed by the AMReX ParmParse module.

This file needs to be specified along with the executable as an argv option, for example:

mpirun -np 64 ./ERF3d.xxx.yyy.ex inputs

Also, any entry that can be specified in the inputs file can also be specified on the command line; values specified on the command line override values in the inputs file, e.g.:

mpirun -np 64 ./ERF3d.gnu.DEBUG.MPI.ex inputs amr.restart=chk0030 erf.use_gravity=true

See Inputs for details on run-time options that can be specified. If running on a Mac and getting errors like SIGILL Invalid, privileged, or ill-formed instruction, see the note on that page about runtime error-checking options.