Jupyter kernel error after installing xbpch

Question

I'm a new user of python and jupyter notebook. Recently I installed xbpch(https://xbpch.readthedocs.io/en/latest/index.html) package in anaconda prompt using: conda install -c conda-forge xbpch And after that every time I open jupyter notebook, there is a kernel error with this traceback message:

Traceback (most recent call last):
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\web.py", line 1592, in _execute
    result = yield result
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1133, in run
    value = future.result()
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1141, in run
    yielded = self.gen.throw(*exc_info)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\notebook\services\sessions\handlers.py", line 73, in post
    type=mtype))
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1133, in run
    value = future.result()
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1141, in run
    yielded = self.gen.throw(*exc_info)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 79, in create_session
    kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1133, in run
    value = future.result()
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1141, in run
    yielded = self.gen.throw(*exc_info)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 92, in start_kernel_for_session
    self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1133, in run
    value = future.result()
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 326, in wrapper
    yielded = next(result)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\notebook\services\kernels\kernelmanager.py", line 160, in start_kernel
    super(MappingKernelManager, self).start_kernel(**kwargs)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\jupyter_client\multikernelmanager.py", line 110, in start_kernel
    km.start_kernel(**kwargs)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\jupyter_client\manager.py", line 259, in start_kernel
    **kw)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\jupyter_client\manager.py", line 204, in _launch_kernel
    return launch_kernel(kernel_cmd, **kw)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\jupyter_client\launcher.py", line 128, in launch_kernel
    proc = Popen(cmd, **kwargs)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\subprocess.py", line 709, in __init__
    restore_signals, start_new_session)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\subprocess.py", line 997, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

Does anyone know how to fix this?

Just a wild speculation: conda-forge is currently migrating packages to a new compiler infrastructure, but xbpch is not yet migrated. Maybe installing xbpch forced conda do pull in now incompatible packages. I would try reinstalling jupyter and jupyter-notebook and see if that helps. — cel

gtsonkov gtsonkov · Accepted Answer · 2019-09-17T20:08:46

Go to you Jupyter directory (ex.C:\Users\Admin\AppData\Roaming\jupyter\kernels\python3) Then make a copy of kernel.json (e.x kernel_old.json) then open with notepad or you JS IDE. Shoud be like this : { "argv": [ "C:\Users\Admin\AppData\Local\Programs\python\python37\python.exe", "-m", "ipykernel_launcher", "-f", "{connection_file}" ], "display_name": "Python 3", "language": "python" } Change the path with you Anaconda3 python in you case: C:\Users\Anaconda3\python.exe Then start jupyter again.

Jupyter kernel error after installing xbpch

1 Answers