Hello, there.
I just installed the Openmc on my Mac with conda-forge,
and then I started the examples (Modeling a Pin-Cell).
When I came to the final to execute openmc.run( ), it came out an error:
FileNotFoundError: [Errno 2] No such file or directory: 'openmc’
So, I don’t know where I made a mistake.
Thank you.!
Meanwhile, when I run the following codes of example, the Jupyter keeps running and cannot get any result, I don’t know why.
!cat $OPENMC_CROSS_SECTIONS | head -n 10
print(’ …’)
!cat $OPENMC_CROSS_SECTIONS | tail -n 10
When you run the openmc.run() function, it tries to call the openmc executable. This message means it is not able to find that executable (the directory containing it is not on your PATH environment variable). If you are running from Jupyter, make sure you are using the conda environment that you installed OpenMC in.
Thanks for your kind reply, Paul.
And finally I fixed that error.
Actually, when I run Jupyter through the Terminal, it’s fine to execute openmc.run( ).
However, when I run Jupyter through Anaconda Navigator, I’ll get the above mentioned error, and I’m sure it is run on openmc-env environment.
Anyway, I can run it through the Terminal, although I don’t know why I cannot make it through Anaconda Navigator shown as the picture.
Again, thank you, Paul.
@Darilhana1 welcome to the community! What do you have your OPENMC_CROSS_SECTIONS environment variable set to? One thing to make sure is that it points to a cross_sections.xml file, not the directory containing it.
Hello everyone,
I’m having a similar problem running this example when I try to plot the image.
plot.to_ipython_image()
---------------------------------------------------------------------------
FileNotFoundError Traceback (most recent call last)
Cell In[9], line 3
1 plot = openmc.Plot.from_geometry(geometry)
2 plot.pixels = (250, 250)
----> 3 plot.to_ipython_image()
File ~/anaconda3/envs/openmc-env/lib/python3.11/site-packages/openmc/plots.py:800, in Plot.to_ipython_image(self, openmc_exec, cwd)
797 Plots([self]).export_to_xml(cwd)
799 # Run OpenMC in geometry plotting mode
--> 800 openmc.plot_geometry(False, openmc_exec, cwd)
802 # Return produced image
803 return _get_plot_image(self, cwd)
File ~/anaconda3/envs/openmc-env/lib/python3.11/site-packages/openmc/executor.py:139, in plot_geometry(output, openmc_exec, cwd)
121 def plot_geometry(output=True, openmc_exec='openmc', cwd='.'):
122 """Run OpenMC in plotting mode
123
124 Parameters
(...)
137
138 """
--> 139 _run([openmc_exec, '-p'], output, cwd)
File ~/anaconda3/envs/openmc-env/lib/python3.11/site-packages/openmc/executor.py:90, in _run(args, output, cwd)
88 def _run(args, output, cwd):
89 # Launch a subprocess
---> 90 p = subprocess.Popen(args, cwd=cwd, stdout=subprocess.PIPE,
91 stderr=subprocess.STDOUT, universal_newlines=True)
93 # Capture and re-print OpenMC output in real-time
94 lines = []
File ~/anaconda3/envs/openmc-env/lib/python3.11/subprocess.py:1022, in Popen.__init__(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags, restore_signals, start_new_session, pass_fds, user, group, extra_groups, encoding, errors, text, umask, pipesize, process_group)
1018 if self.text_mode:
1019 self.stderr = io.TextIOWrapper(self.stderr,
1020 encoding=encoding, errors=errors)
-> 1022 self._execute_child(args, executable, preexec_fn, close_fds,
1023 pass_fds, cwd, env,
1024 startupinfo, creationflags, shell,
1025 p2cread, p2cwrite,
1026 c2pread, c2pwrite,
1027 errread, errwrite,
1028 restore_signals,
1029 gid, gids, uid, umask,
1030 start_new_session, process_group)
1031 except:
1032 # Cleanup if the child failed starting.
1033 for f in filter(None, (self.stdin, self.stdout, self.stderr)):
File ~/anaconda3/envs/openmc-env/lib/python3.11/subprocess.py:1899, in Popen._execute_child(self, args, executable, preexec_fn, close_fds, pass_fds, cwd, env, startupinfo, creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite, restore_signals, gid, gids, uid, umask, start_new_session, process_group)
1897 if errno_num != 0:
1898 err_msg = os.strerror(errno_num)
-> 1899 raise child_exception_type(errno_num, err_msg, err_filename)
1900 raise child_exception_type(err_msg)
FileNotFoundError: [Errno 2] No such file or directory: 'openmc'
I reviewed the path variable, but it seems to be okay.
import sys
sys.path
['/home/maxi/OpenMC/Excercises',
'/home/maxi/anaconda3/envs/openmc-env/lib/python311.zip',
'/home/maxi/anaconda3/envs/openmc-env/lib/python3.11',
'/home/maxi/anaconda3/envs/openmc-env/lib/python3.11/lib-dynload',
'',
'/home/maxi/anaconda3/envs/openmc-env/lib/python3.11/site-packages']
This is the location of the OpenMC module:
/home/maxi/anaconda3/envs/openmc-env/lib/python3.11/site-packages/openmc/__init__.py
I’m running jupyter notebook from the Terminal, and then changing to the openmc-env environment inside the notebook, so I don’t believe this is the problem. Could you help me? Thanks!