config["Problem"]

"Problem":
{
    "Type": <string>,
    "Verbose": <int>,
    "Output": <string>,
    "OutputFormats":
    {
      ...
    }
}

with

"Type" [None] : Controls the simulation type. The available options are:

• "Eigenmode" : Perform a undamped or damped eigenfrequency analysis.
• "Driven" : Perform a frequency response simulation.
• "Transient" : Perform a time domain excitation response simulation.
• "Electrostatic" : Perform an electrostatic analysis to compute the capacitance matrix for a set of voltage terminals.
• "Magnetostatic" : Perform a magnetostatic analysis to compute the inductance matrix for a set of current sources.

"Verbose" [1] : Controls the level of log file printing.

"Output" [None] : Directory path for saving postprocessing outputs.

"OutputFormats" : Top-level object for configuring the field output formats.

problem["OutputFormats"]

"OutputFormats":
{
    "Paraview": <bool>,
    "GridFunction": <bool>
}

with

"Paraview" [true] : Set to true to output fields in Paraview format.

"GridFunction" [false] : Set to true to output fields in MFEM grid function format to visualize with GLVis.