我刚刚下载了Iris并试图查看 .grib 文件的内容。我在下面尝试了一段非常简单的代码，但得到了一些错误。谁能看到可能导致问题的原因？
谢谢
import iris
fn='C:\Users\mmso2\Desktop\grib files ECMWF\2006\_mars-atls17-95e2cf679cd58ee9b4db4dd119a05a8d-GOnSTm.grib'
cubes = iris.load(fn)
错误：
C:\Anaconda2\python.exe "C:/Users/mmso2/Google Drive/MABL Wind/_Semester 2 2016/_PGR Training/CENTA/MATLAB/In class ex/SAR_data/grib_files_check.py"
Traceback (most recent call last):
File "C:/Users/mmso2/Google Drive/MABL Wind/_Semester 2 2016/_PGR Training/CENTA/MATLAB/In class ex/SAR_data/grib_files_check.py", line 2, in <module>
import iris
File "C:\Anaconda2\lib\site-packages\iris\__init__.py", line 110, in <module>
import iris.cube
File "C:\Anaconda2\lib\site-packages\iris\cube.py", line 39, in <module>
import iris.analysis
File "C:\Anaconda2\lib\site-packages\iris\analysis\__init__.py", line 61, in <module>
from iris.analysis._area_weighted import AreaWeightedRegridder
File "C:\Anaconda2\lib\site-packages\iris\analysis\_area_weighted.py", line 23, in <module>
from iris.analysis._interpolation import get_xy_dim_coords, snapshot_grid
File "C:\Anaconda2\lib\site-packages\iris\analysis\_interpolation.py", line 31, in <module>
from iris.analysis.cartography import wrap_lons as wrap_circular_points
File "C:\Anaconda2\lib\site-packages\iris\analysis\cartography.py", line 29, in <module>
import cf_units
File "C:\Anaconda2\lib\site-packages\cf_units\__init__.py", line 394, in <module>
_status_msg, _error_msg))
OSError: [UT_OPEN_ARG] Failed to open UDUNITS-2 XML unit database : "No such file or directory"
Process finished with exit code 1
更新：康达环境
# packages in environment at C:\Anaconda2:
#
Using Anaconda Cloud api site https://api.anaconda.org
alabaster 0.7.7 py27_0 defaults
anaconda 4.0.0 np110py27_0 defaults
anaconda-client 1.4.0 py27_0 defaults
anaconda-navigator 1.1.0 py27_0 defaults
basemap 1.0.7 np110py27_0 anaconda
argcomplete 1.0.0 py27_1 defaults
astropy 1.1.2 np110py27_0 defaults
babel 2.2.0 py27_0 defaults
backports_abc 0.4 py27_0 defaults
beautifulsoup4 4.4.1 py27_0 defaults
bitarray 0.8.1 py27_1 defaults
blaze 0.9.1 py27_0 defaults
bokeh 0.11.1 py27_0 defaults
boto 2.39.0 py27_0 defaults
bottleneck 1.0.0 np110py27_0 defaults
bzip2 1.0.6 vc9_2 [vc9] defaults
cdecimal 2.3 py27_1 defaults
cffi 1.5.2 py27_0 defaults
chest 0.2.3 py27_0 defaults
cloudpickle 0.1.1 py27_0 defaults
clyent 1.2.1 py27_0 defaults
colorama 0.3.7 py27_0 defaults
comtypes 1.1.2 py27_0 defaults
conda 4.1.11 py27_0 defaults
conda-build 1.20.0 py27_0 defaults
conda-env 2.5.2 py27_0 defaults
conda-manager 0.3.1 py27_0 defaults
configobj 5.0.6 py27_0 defaults
console_shortcut 0.1.1 py27_1 defaults
cryptography 1.3 py27_0 defaults
curl 7.45.0 vc9_1 [vc9] defaults
cycler 0.10.0 py27_0 defaults
cython 0.23.4 py27_0 defaults
cytoolz 0.7.5 py27_0 defaults
dask 0.8.1 py27_0 defaults
datashape 0.5.1 py27_0 defaults
decorator 4.0.9 py27_0 defaults
dill 0.2.4 py27_0 defaults
docutils 0.12 py27_1 defaults
ecmwf-api-client 1.4.1 <pip>
enum34 1.1.2 py27_0 defaults
et_xmlfile 1.0.1 py27_0 defaults
fastcache 1.0.2 py27_0 defaults
flask 0.10.1 py27_1 defaults
flask-cors 2.1.2 py27_0 defaults
freetype 2.5.5 vc9_0 [vc9] defaults
funcsigs 0.4 py27_0 defaults
futures 3.0.3 py27_0 defaults
geos 3.5.0 vc9_0 [vc9] defaults
gevent 1.1.0 py27_0 defaults
greenlet 0.4.9 py27_0 defaults
grin 1.2.1 py27_2 defaults
h5py 2.5.0 np110py27_4 defaults
hdf5 1.8.15.1 vc9_4 [vc9] defaults
heapdict 1.0.0 py27_0 defaults
idna 2.0 py27_0 defaults
ipaddress 1.0.14 py27_0 defaults
ipykernel 4.3.1 py27_0 defaults
ipython 4.1.2 py27_1 defaults
ipython_genutils 0.1.0 py27_0 defaults
ipywidgets 4.1.1 py27_0 defaults
itsdangerous 0.24 py27_0 defaults
jdcal 1.2 py27_0 defaults
jedi 0.9.0 py27_0 defaults
jinja2 2.8 py27_0 defaults
jpeg 8d vc9_0 [vc9] defaults
jsonschema 2.4.0 py27_0 defaults
jupyter 1.0.0 py27_2 defaults
jupyter_client 4.2.2 py27_0 defaults
jupyter_console 4.1.1 py27_0 defaults
jupyter_core 4.1.0 py27_0 defaults
libpng 1.6.17 vc9_1 [vc9] defaults
libsodium 1.0.3 0 defaults
libtiff 4.0.6 vc9_1 [vc9] defaults
llvmlite 0.9.0 py27_0 defaults
locket 0.2.0 py27_0 defaults
lxml 3.6.0 py27_0 defaults
markupsafe 0.23 py27_1 defaults
matplotlib 1.5.1 np110py27_0 defaults
menuinst 1.3.2 py27_0 defaults
mistune 0.7.2 py27_0 defaults
mkl 11.3.1 0 defaults
mkl-service 1.1.2 py27_0 defaults
mock 1.3.0 py27_0 defaults
mpmath 0.19 py27_0 defaults
multipledispatch 0.4.8 py27_0 defaults
nbconvert 4.1.0 py27_0 defaults
nbformat 4.0.1 py27_0 defaults
netcdf4 1.2.2 np110py27_0 defaults
netCDF4 1.2.4 <pip>
networkx 1.11 py27_0 defaults
nltk 3.2 py27_0 defaults
nose 1.3.7 py27_0 defaults
notebook 4.1.0 py27_2 defaults
numba 0.24.0 np110py27_0 defaults
numexpr 2.5 np110py27_0 defaults
numpy 1.10.4 py27_0 defaults
odo 0.4.2 py27_0 defaults
openpyxl 2.3.2 py27_0 defaults
openssl 1.0.2g vc9_0 [vc9] defaults
pandas 0.18.0 np110py27_0 defaults
partd 0.3.2 py27_1 defaults
path.py 8.1.2 py27_1 defaults
patsy 0.4.0 np110py27_0 defaults
pbr 1.3.0 py27_0 defaults
pep8 1.7.0 py27_0 defaults
pickleshare 0.5 py27_0 defaults
pillow 3.1.1 py27_0 defaults
pip 8.1.2 py27_0 defaults
ply 3.8 py27_0 defaults
psutil 4.1.0 py27_0 defaults
py 1.4.31 py27_0 defaults
pyasn1 0.1.9 py27_0 defaults
pycosat 0.6.1 py27_0 defaults
pycparser 2.14 py27_0 defaults
pycrypto 2.6.1 py27_3 defaults
pyflakes 1.1.0 py27_0 defaults
pygments 2.1.1 py27_0 defaults
pyopenssl 0.15.1 py27_2 defaults
pyparsing 2.0.3 py27_0 defaults
pyproj 1.9.5.1 py27_0 defaults
pyqt 4.11.4 py27_5 defaults
pyreadline 2.1 py27_0 defaults
pytables 3.2.2 np110py27_2 defaults
pytest 2.8.5 py27_0 defaults
python 2.7.12 0 defaults
python-dateutil 2.5.1 py27_0 defaults
python-hdf4 0.9 <pip>
pytz 2016.2 py27_0 defaults
pywin32 220 py27_1 defaults
pyyaml 3.11 py27_3 defaults
pyzmq 15.2.0 py27_0 defaults
qt 4.8.7 vc9_7 [vc9] defaults
qtawesome 0.3.2 py27_0 defaults
qtconsole 4.2.0 py27_1 defaults
qtpy 1.0 py27_0 defaults
requests 2.9.1 py27_0 defaults
rope 0.9.4 py27_1 defaults
ruamel_yaml 0.11.7 py27_0 defaults
scikit-image 0.12.3 np110py27_0 defaults
scikit-learn 0.17.1 np110py27_0 defaults
scipy 0.17.0 np110py27_0 defaults
biggus 0.14.0 py27_0 scitools
cartopy 0.14.2 np110py27_0 scitools
cf_units 1.1 py27_0 scitools
expat 2.1.0 6 scitools
iris 1.9.2 np110py27_0 scitools
owslib 0.10.3 py27_0 scitools
proj.4 4.9.1 py27_1 scitools
pyepsg 0.2.0 py27_0 scitools
pyke 1.1.1 py27_1 scitools
pyshp 1.2.3 py27_0 scitools
shapely 1.5.13 np110py27_1 scitools
udunits2 2.2.20 0 scitools
setuptools 20.3 py27_0 defaults
simplegeneric 0.8.1 py27_0 defaults
singledispatch 3.4.0.3 py27_0 defaults
sip 4.16.9 py27_2 defaults
six 1.10.0 py27_0 defaults
snowballstemmer 1.2.1 py27_0 defaults
sockjs-tornado 1.0.1 py27_0 defaults
sphinx 1.3.5 py27_0 defaults
sphinx_rtd_theme 0.1.9 py27_0 defaults
spyder 2.3.8 py27_1 defaults
sqlalchemy 1.0.12 py27_0 defaults
ssl_match_hostname 3.4.0.2 py27_0 defaults
statsmodels 0.6.1 np110py27_0 defaults
sympy 1.0 py27_0 defaults
tk 8.5.18 vc9_0 [vc9] defaults
toolz 0.7.4 py27_0 defaults
tornado 4.3 py27_0 defaults
traitlets 4.2.1 py27_0 defaults
unicodecsv 0.14.1 py27_0 defaults
vs2008_runtime 9.00.30729.1 0 defaults
vs2010_runtime 10.00.40219.1 0 defaults
werkzeug 0.11.4 py27_0 defaults
wheel 0.29.0 py27_0 defaults
xlrd 0.9.4 py27_0 defaults
xlsxwriter 0.8.4 py27_0 defaults
xlwings 0.7.0 py27_0 defaults
xlwt 1.0.0 py27_0 defaults
zlib 1.2.8 vc9_2 [vc9] defaults