The default namelist.input in the parm/ subdirectory has two typos, lines 1 (grid_file_input_grid) and 3 (diag_file_input_grid). Instead of = signs to separate the variable name and file paths, they have - signs. This causes MPASSIT to crash on execution with an error reading the namelist. Replacing the - with = fixes the issue.
The default namelist.input in the parm/ subdirectory has two typos, lines 1 (grid_file_input_grid) and 3 (diag_file_input_grid). Instead of = signs to separate the variable name and file paths, they have - signs. This causes MPASSIT to crash on execution with an error reading the namelist. Replacing the - with = fixes the issue.