c:\Users\guiga\Documents\github\RocketPy\tests\acceptance\test_ndrt_2020_rocket.py::test_ndrt_2020_rocket_data_asserts_acceptance[data/weather/ndrt_2020_weather_data_ERA5_new.nc] failed: env_file = 'data/weather/ndrt_2020_weather_data_ERA5_new.nc'

    @pytest.mark.parametrize(
        "env_file",
        [
            "data/weather/ndrt_2020_weather_data_ERA5.nc",
            "data/weather/ndrt_2020_weather_data_ERA5_new.nc",
        ],
    )
    def test_ndrt_2020_rocket_data_asserts_acceptance(env_file):
        # Notre Dame Rocket Team 2020 Flight
        # Launched at 19045-18879 Avery Rd, Three Oaks, MI 49128
        # Permission to use flight data given by Brooke Mumma, 2020
        #
        # IMPORTANT RESULTS  (23rd feb)
        # Measured Stability Margin 2.875 cal
        # Official Target Altitude 4,444 ft
        # Measured Altitude 4,320 ft or 1316.736 m
        # Drift: 2275 ft
    
        # Importing libraries
    
        # Defining all parameters
        parameters = {
            # Mass Details
            "rocket_mass": (23.321 - 2.475 - 1, 0.010),
            # propulsion details
            "impulse": (4895.050, 0.033 * 4895.050),
            "burn_time": (3.45, 0.1),
            "nozzle_radius": (49.5 / 2000, 0.001),
            "throat_radius": (21.5 / 2000, 0.001),
            "grain_separation": (3 / 1000, 0.001),
            "grain_density": (1519.708, 30),
            "grain_outer_radius": (33 / 1000, 0.001),
            "grain_initial_inner_radius": (15 / 1000, 0.002),
            "grain_initial_height": (120 / 1000, 0.001),
            # aerodynamic details
            "drag_coefficient": (0.44, 0.1),
            "inertia_i": (83.351, 0.3 * 83.351),
            "inertia_z": (0.15982, 0.3 * 0.15982),
            "radius": (203 / 2000, 0.001),
            "distance_rocket_nozzle": (-1.255, 0.100),
            "distance_rocket_propellant": (-0.85704, 0.100),
            "power_off_drag": (1, 0.033),
            "power_on_drag": (1, 0.033),
            "nose_length": (0.610, 0.001),
            "nose_distance_to_cm": (0.71971, 0.100),
            "fin_span": (0.165, 0.001),
            "fin_root_chord": (0.152, 0.001),
            "fin_tip_chord": (0.0762, 0.001),
            "fin_distance_to_cm": (-1.04956, 0.100),
            "transition_top_radius": (203 / 2000, 0.010),
            "transition_bottom_radius": (155 / 2000, 0.010),
            "transition_length": (0.127, 0.010),
            "transition_distance_to_cm": (-1.194656, 0.010),
            # launch and environment details
            "wind_direction": (0, 3),
            "wind_speed": (1, 0.30),
            "inclination": (90, 1),
            "heading": (181, 3),
            "rail_length": (3.353, 0.001),
            # parachute details
            "cd_s_drogue": (1.5 * np.pi * (24 * 25.4 / 1000) * (24 * 25.4 / 1000) / 4, 0.1),
            "cd_s_main": (2.2 * np.pi * (120 * 25.4 / 1000) * (120 * 25.4 / 1000) / 4, 0.1),
            "lag_rec": (1, 0.5),
        }
    
        # Environment conditions
        env = Environment(
            gravity=9.81,
            latitude=41.775447,
            longitude=-86.572467,
            date=(2020, 2, 23, 16),
            elevation=206,
        )
>       env.set_atmospheric_model(
            type="Reanalysis",
            file=env_file,
            dictionary="ECMWF",
        )

tests\acceptance\test_ndrt_2020_rocket.py:82: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
rocketpy\environment\environment.py:1275: in set_atmospheric_model
    self.process_forecast_reanalysis(dataset, dictionary)
rocketpy\environment\environment.py:1915: in process_forecast_reanalysis
    self.atmospheric_model_interval = get_interval_date_from_time_array(time_array)
rocketpy\environment\tools.py:435: in get_interval_date_from_time_array
    return netCDF4.num2date(
src\\cftime\\_cftime.pyx:630: in cftime._cftime.num2date
    ???
src\\cftime\\_cftime.pyx:474: in cftime._cftime.decode_date_from_scalar
    ???
.venv\Lib\site-packages\numpy\ma\core.py:4317: in __radd__
    return add(other, self)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <numpy.ma.core._MaskedBinaryOperation object at 0x00000284DAF55130>
a = cftime.DatetimeGregorian(1970, 1, 1, 0, 0, 0, 0, has_year_zero=False)
b = masked_array(data=--,
             mask=True,
       fill_value=np.str_('?'),
            dtype=object)
args = (), kwargs = {}
da = array(cftime.DatetimeGregorian(1970, 1, 1, 0, 0, 0, 0, has_year_zero=False),
      dtype=object)
db = array(datetime.timedelta(0), dtype=object)
result = cftime.DatetimeGregorian(1970, 1, 1, 0, 0, 0, 0, has_year_zero=False)
ma = np.False_, mb = array(True), m = np.True_

    def __call__(self, a, b, *args, **kwargs):
        """
        Execute the call behavior.
    
        """
        # Get the data, as ndarray
        (da, db) = (getdata(a), getdata(b))
        # Get the result
        with np.errstate():
            np.seterr(divide='ignore', invalid='ignore')
            result = self.f(da, db, *args, **kwargs)
        # Get the mask for the result
        (ma, mb) = (getmask(a), getmask(b))
        if ma is nomask:
            if mb is nomask:
                m = nomask
            else:
                m = umath.logical_or(getmaskarray(a), mb)
        elif mb is nomask:
            m = umath.logical_or(ma, getmaskarray(b))
        else:
            m = umath.logical_or(ma, mb)
    
        # Case 1. : scalar
>       if not result.ndim:
E       AttributeError: 'cftime._cftime.DatetimeGregorian' object has no attribute 'ndim'

.venv\Lib\site-packages\numpy\ma\core.py:1068: AttributeError