Dear all, I tried to open an ipython notebook (yt-x86_64)[yd742@ria run5]$ *yt notebook* But got the following error. Any ideas? /home/yd742/software/withpysci/yt-x86_64/lib/python2.7/site-packages/IPython/frontend.py:30: UserWarning: The top-level `frontend` package has been deprecated. All its subpackages have been moved to the top `IPython` level. warn("The top-level `frontend` package has been deprecated. " Traceback (most recent call last): File "/home/yd742/software/withpysci/yt-x86_64/bin/yt", line 9, in <module> load_entry_point('yt==2.6.3', 'console_scripts', 'yt')() File "/home/yd742/software/withpysci/yt-x86_64/src/yt-hg/yt/utilities/command_line.py", line 1702, in run_main args.func(args) File "/home/yd742/software/withpysci/yt-x86_64/src/yt-hg/yt/utilities/command_line.py", line 84, in run self(args) File "/home/yd742/software/withpysci/yt-x86_64/src/yt-hg/yt/utilities/command_line.py", line 1458, in __call__ from IPython.frontend.html.notebook.notebookapp import NotebookApp File "/home/yd742/software/withpysci/yt-x86_64/lib/python2.7/site-packages/IPython/html/notebookapp.py", line 38, in <module> from jinja2 import Environment, FileSystemLoader ImportError: No module named jinja2 =================================== I'm using yt Version = 2.6.1 Changeset = c994959ed3be ======================= I would very much appreciate it if anyone could help me on this. Regards, Dai