There is no FATAL, the model just cores when debug mode executable is used with a traceback:
forrtl: error (63): output conversion error, unit -5, file Internal Formatted Write
Image PC Routine Line Source
ms_cm4_compile.x 00000000027CEE64 mom_grid_initiali 440 MOM_grid_initialize.F90
fms_cm4_compile.x 00000000027CD25F mom_grid_initiali 399 MOM_grid_initialize.F90
fms_cm4_compile.x 0000000003497845 mom_initializatio 293 MOM_initialization.F90
fms_cm4_compile.x 000000000216AC19 mom_mp_initialize 1743 MOM.F90
fms_cm4_compile.x 0000000001FABD64 ocean_model_mod_m 223 ocean_model_MOM.F90
fms_cm4_compile.x 0000000000415F20 coupler_main_IP_c 1466 coupler_main.F90
fms_cm4_compile.x 0000000000400A46 MAIN__ 428 coupler_main.F90
There is no FATAL, the model just cores when debug mode executable is used with a traceback: