CLOSE_BINARY  1
CLOSE_NETCDF  1
DEFINE_FIELD_BINARY  1
DEFINE_FIELD_NETCDF  1
EXIT_POP  4
OPEN_BINARY  1
OPEN_NETCDF  1
OPEN_READ_BINARY  1
OPEN_READ_NETCDF  1
READ_FIELD_BINARY  1
READ_FIELD_NETCDF  1
SYNC_NETCDF  1
WRITE_FIELD_BINARY  1
WRITE_FIELD_NETCDF  1