Kevin, Thanks again. I managed to get the R kernel to work properly. To fix the R kernel issue, i removed it and installed it from R official website where there are very easy and clear instructions on how to do that. *https://irkernel.github.io/installation/*
I deleted the old Julia kernel, IJulia,, that appears on the console but did not work, and reinstalled it from Julia. Now, the kernel does not appear on jupyter console, and i could not figure out how to make jupyter recognizes it. There are reported issues with Julia kernel on jupyter; one of them is that julia kernel installs conda with it; i did not use conda. Thanks again, EK On Tuesday, July 26, 2022 at 1:45:58 PM UTC-7 [email protected] wrote: > "FileNotFoundError: [WinError 2] The system cannot find the file > specified" is typically due to the program that Jupyter is trying to > launch (i.e., the kernel process) not being found. This is presented by > the first entry of the argv list in the corresponding kernel.json file. > I recommend double-checking those paths (and any others in each of the > kernel.json files) and ensuring each is accessible from the CMD prompt. > Should any changes be necessary, these are text files that must be loaded > as JSON, so any text editor should be fine provided the JSON structure is > preserved. If you happen to mess up the structure, the symptom you'll see > is that that particular kernel is no longer available in the kernel > selection list. > > I can also tell from the stack trace that you're running with an older > version of jupyter_client. This shouldn't be a problem but wanted to > point that out in case you do find an issue with the Jupyter packages. At > present, this issue has all the symptoms of configuration related where > some file references don't "line up" with what's actually there. These > kinds of issues can tend to be more frustrating in Windows environments > where the path separators can vary, drive letters are in play, '~' are > used to shorten paths, etc. > > It looks like your argv for Julia is a bit cleaner relative to Windows, > so I would start with that kernel in your troubleshooting efforts. > > On Tuesday, July 26, 2022 at 10:18:13 AM UTC-7 [email protected] wrote: > >> Hi Again, >> >> I reinstalled R; now both R and Julia kernels give the same error "error >> installing kernel unhandled error, unhandled error"; details are below >> >> [I 2022-07-26 09:21:24.106 ServerApp] Creating new notebook in >> /Documents/EK EsawiPD/Scripts >> >> [E 2022-07-26 09:21:25.228 ServerApp] Failed to run command: >> >> ['C:/PROGRA~1/R/R-41~1.0/bin/x64/R', '--slave', '-e', >> 'IRkernel::main()', '--args', >> 'C:\\Users\\eesawi\\AppData\\Roaming\\jupyter\\runtime\\kernel-04406fc5-9a32-453f-bf4b-f5dd9ed82505.json'] >> >> PATH='C:\\Program Files (x86)\\Razer Chroma SDK\\bin;C:\\Program >> Files\\Razer Chroma SDK\\bin;C:\\Program Files >> (x86)\\Razer\\ChromaBroadcast\\bin;C:\\Program >> Files\\Razer\\ChromaBroadcast\\bin;C:\\Program Files (x86)\\Common >> Files\\Oracle\\Java\\javapath;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\Program >> >> Files (x86)\\Intel\\Intel(R) Management Engine Components\\DAL;C:\\Program >> Files\\Intel\\Intel(R) Management Engine >> Components\\DAL;C:\\Users\\eesawi\\AppData\\Local\\Programs\\Python\\Python35;C:\\Users\\eesawi\\AppData\\Local\\Programs\\Python\\Python35\\Scripts;C:\\Program >> >> Files\\Git\\cmd;C:\\WINDOWS\\system32\\config\\systemprofile\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Users\\eesawi\\AppData\\Local\\Programs\\Microsoft >> >> VS >> Code\\bin;C:\\Users\\eesawi\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Users\\eesawi\\AppData\\Local\\Programs\\Python\\Python39\\Scripts;C:\\Users\\eesawi\\AppData\\Local\\atom\\bin;%USERPROFILE%\\AppData\\Local\\Microsoft\\WindowsApps;' >> >> with kwargs: >> >> {'stdin': -1, 'stdout': None, 'stderr': None, 'cwd': >> 'C:\\Users\\eesawi\\Documents\\EK EsawiPD\\Scripts', 'close_fds': False} >> >> >> >> [E 2022-07-26 09:21:25.228 ServerApp] Uncaught exception POST >> /api/sessions?1658852485196 (127.0.0.1) >> >> HTTPServerRequest(protocol='http', host='localhost:8888', >> method='POST', uri='/api/sessions?1658852485196', version='HTTP/1.1', >> remote_ip='127.0.0.1') >> >> Traceback (most recent call last): >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\site-packages\tornado\web.py", >> >> line 1704, in _execute >> >> result = await result >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\site-packages\jupyter_server\services\sessions\handlers.py", >> >> line 67, in post >> >> model = await sm.create_session( >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\site-packages\jupyter_server\services\sessions\sessionmanager.py", >> >> line 91, in create_session >> >> kernel_id = await self.start_kernel_for_session(session_id, >> path, name, type, kernel_name) >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\site-packages\jupyter_server\services\sessions\sessionmanager.py", >> >> line 99, in start_kernel_for_session >> >> kernel_id = await >> self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name) >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\site-packages\jupyter_server\services\kernels\kernelmanager.py", >> >> line 187, in start_kernel >> >> kernel_id = await >> ensure_async(self.pinned_superclass.start_kernel(self, **kwargs)) >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\site-packages\jupyter_server\utils.py", >> >> line 172, in ensure_async >> >> result = await obj >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\site-packages\jupyter_client\multikernelmanager.py", >> >> line 483, in start_kernel >> >> await fut >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\site-packages\jupyter_client\multikernelmanager.py", >> >> line 460, in _add_kernel_when_ready >> >> await kernel_awaitable >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\site-packages\jupyter_client\manager.py", >> >> line 661, in start_kernel >> >> self.kernel = await self._launch_kernel(kernel_cmd, **kw) >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\site-packages\jupyter_client\manager.py", >> >> line 642, in _launch_kernel >> >> res = launch_kernel(kernel_cmd, **kw) >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\site-packages\jupyter_client\launcher.py", >> >> line 132, in launch_kernel >> >> proc = Popen(cmd, **kwargs) >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\subprocess.py", >> line 951, in __init__ >> >> self._execute_child(args, executable, preexec_fn, close_fds, >> >> File >> "c:\users\eesawi\appdata\local\programs\python\python39\lib\subprocess.py", >> line 1420, in _execute_child >> >> hp, ht, pid, tid = _winapi.CreateProcess(executable, args, >> >> FileNotFoundError: [WinError 2] The system cannot find the file >> specified >> >> [W 2022-07-26 09:21:25.468 ServerApp] Unhandled error >> >> [E 2022-07-26 09:21:25.471 ServerApp] { >> >> "Host": "localhost:8888", >> >> "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:96.0) >> Gecko/20100101 Firefox/96.0", >> >> "Accept": "*/*", >> >> "Accept-Language": "en-US,en;q=0.5", >> >> "Accept-Encoding": "gzip, deflate", >> >> "Referer": " >> http://localhost:8888/lab/tree/Documents/EK%20EsawiPD/Scripts/Untitled2.ipynb >> ", >> >> "Content-Type": "text/plain;charset=UTF-8", >> >> "Authorization": "token >> c2471bb8fc507afe67c6e214fea4d923bdf1ab74b4baea3d", >> >> "X-Xsrftoken": >> "2|6bc60900|7dac534b086993b020c27c66807bdf22|1658266876", >> >> "Origin": "http://localhost:8888";, >> >> "Content-Length": "142", >> >> "Connection": "keep-alive", >> >> "Cookie": >> "_xsrf=2|6bc60900|7dac534b086993b020c27c66807bdf22|1658266876; >> username-localhost-8888=\"2|1:0|10:1658852485|23:username-localhost-8888|44:MzM3NGU2MzM4YzcxNDI4YWE2ZTExYzQ4ZTk4OWRiNzY=|6e9df3938d5b32de3b028e7120e94b3b1ecc08d227f15b2c96c0e1804a6329b0\"", >> >> "Sec-Fetch-Dest": "empty", >> >> "Sec-Fetch-Mode": "cors", >> >> "Sec-Fetch-Site": "same-origin", >> >> "Pragma": "no-cache", >> >> "Cache-Control": "no-cache" >> >> } >> >> [E 2022-07-26 09:21:25.474 ServerApp] 500 POST >> /api/sessions?1658852485196 (127.0.0.1) 273.75ms referer= >> http://localhost:8888/lab/tree/Documents/EK%20EsawiPD/Scripts/Untitled2.ipynb >> On Monday, July 25, 2022 at 6:04:12 PM UTC-7 Ek Esawi wrote: >> >>> Kevin, >>> >>> >>> >>> Thank you so much for your help. The name issue makes sense now. The >>> issue with the R kernel is that it doesn’t generate any errors. It >>> just simply will not run the code and suddenly, instead of the active >>> kernel is R, changes to no kernel. >>> >>> >>> >>> Julia, on the other hand, generates messages but I don’t understand them >>> and don’t want to post the whole page of messages because it may not be >>> appropriate to do so. Here are the listed kernels >>> >>> Available kernels: >>> >>> ir C:\Users\eesawi\AppData\Roaming\jupyter\kernels\ir >>> >>> julia-1.7 C:\Users\eesawi\AppData\Roaming\jupyter\kernels\julia-1.7 >>> >>> python3 >>> c:\users\eesawi\appdata\local\programs\python\python39\share\jupyter\kernels\python3 >>> >>> I looked at each kernel json file, but I don’t know how to change them >>> to run the kernels properly. >>> >>> Here are the 2 json files >>> >>> { >>> >>> "argv": ["C:/PROGRA~1/R/R-41~1.0/bin/x64/R", "--slave", "-e", >>> "IRkernel::main()", "--args", "{connection_file}"], >>> >>> "display_name": "R", >>> >>> "language": "R" >>> >>> } >>> >>> >>> >>> { >>> >>> "display_name": "Julia 1.7.3", >>> >>> "interrupt_mode": "message", >>> >>> "argv": [ >>> >>> >>> "C:\\Users\\eesawi\\Downloads\\julia-1.7.3-win32\\julia-1.7.3\\bin\\julia.exe", >>> >>> "-i", >>> >>> "--color=yes", >>> >>> "--project=@.", >>> >>> >>> "C:\\Users\\eesawi\\.julia\\packages\\IJulia\\AQu2H\\src\\kernel.jl", >>> >>> "{connection_file}" >>> >>> ], >>> >>> "env": {}, >>> >>> "language": "julia" >>> >>> } >>> >>> >>> EK >>> >>> On Mon, Jul 25, 2022 at 5:06 PM Kevin Bates <[email protected]> wrote: >>> >>>> Hello EK. >>>> >>>> The ".ipynb" extension is not meant to indicate the type of kernel to >>>> which the notebook file is associated, it's purely an indicator that this >>>> is a Jupyter notebook and is more a function of the project having been >>>> originally named IPython. Had the project been named Jupyter from the >>>> start, I imagine the extension would have been ".jnb". >>>> >>>> I suspect your R and Julia kernels are not correctly configured since >>>> it appears the server knows about them (as they are selectable) but is >>>> encountering an error during their startup. I recommend looking at your >>>> server's console (where the Lab instance was started) since there should >>>> be >>>> some information specific to the failed start attempts. You probably have >>>> some additional dependencies missing. You will likely need to look at the >>>> `argv` stanza of the `kernel.json` file associated with your R and/or >>>> Julia >>>> kernels since that is the command that is issued to start each kernel. >>>> >>>> Lastly, if you would like to change your "default" kernel, you can >>>> configure 'MappingKernelManager.default_kernel_name=julia'. This can be >>>> done within a configuration file via >>>> 'c.MappingKernelManager.default_kernel_name=julia' or the command line via >>>> '--MappingKernelManager.default_kernel_name=julia'. Note that I'm not >>>> familiar with the Julia kernel or its default naming but am assuming its >>>> configuration resides in the directory named 'julia' - which is the target >>>> of the 'default_kernel_name' attribute I reference and where its >>>> aforementioned `kernel.json` file will reside. >>>> >>>> Note that the directories for where the `kernel.json` files reside can >>>> be found using `jupyter kernelspec list` and (for completeness) the >>>> left-hand values of that output is the string that should be referenced in >>>> the 'default_kernel_name' configuration option. >>>> >>>> Best regards, >>>> Kevin. >>>> >>>> On Monday, July 25, 2022 at 2:22:20 PM UTC-7 [email protected] wrote: >>>> >>>>> Hi all-- >>>>> >>>>> I installed Jupyterlab with python3 and kernels installed. I added >>>>> Julia kernel. Now, every time i open a new notebook, the file >>>>> automatically given ipynb extension. When i change the kernel to R, the >>>>> code does not run and the kernel on top right changes to no kernel and >>>>> defaults back to Python3. >>>>> >>>>> If i chose Julia kernel, i get this error "error starting kernel, >>>>> unhandled error" >>>>> >>>>> Any input is highly appreciated. >>>>> >>>>> EK >>>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Project Jupyter" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/jupyter/9be078cd-147d-49f7-97d1-94ccdff443b1n%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/jupyter/9be078cd-147d-49f7-97d1-94ccdff443b1n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- You received this message because you are subscribed to the Google Groups "Project Jupyter" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jupyter/66bbb8e5-a8c9-4285-8fd4-eec0a2b9d199n%40googlegroups.com.
