Microsoft Windows [Version 10.0.26200.8894] (c) Microsoft Corporation. All rights reserved. C:\Users\johan>set ALLUSERSPROFILE=C:\ProgramData APPDATA=C:\Users\johan\AppData\Roaming BOOST_DIR=C:\Libraries\boost_1_90_0 CommonProgramFiles=C:\Program Files\Common Files CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files CommonProgramW6432=C:\Program Files\Common Files COMPUTERNAME=JRADE-6 ComSpec=C:\WINDOWS\system32\cmd.exe DriverData=C:\Windows\System32\Drivers\DriverData EFC_13864_1592913036=1 EFC_13864_4126798990=1 GHCUP_INSTALL_BASE_PREFIX=C:\ HOMEDRIVE=C: HOMEPATH=\Users\johan INTEL_COMPILER_DIR=C:\Program Files (x86)\Intel\oneAPI\compiler\latest INTEL_MKL_DIR=C:\Program Files (x86)\Intel\oneAPI\mkl\latest LBFGSpp_DIR=C:\Libraries\LBFGSpp LOCALAPPDATA=C:\Users\johan\AppData\Local LOGONSERVER=\\JRADE-6 MOZ_PLUGIN_PATH=C:\Program Files (x86)\Foxit Software\Foxit PDF Reader\plugins\ NUMBER_OF_PROCESSORS=20 OneDrive=C:\Users\johan\OneDrive OS=Windows_NT Path=C:\Python314\Scripts\;C:\Python314\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\Git\cmd;C:\Program Files\dotnet\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\NVIDIA Corporation\NVIDIA app\NvDLISR;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\Program Files\TortoiseGit\bin;C:\Program Files\CMake\bin;C:\Users\johan\AppData\Local\Microsoft\WindowsApps;C:\Users\johan\AppData\Local\Programs\Microsoft VS Code\bin; PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;.PYW PROCESSOR_ARCHITECTURE=AMD64 PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 186 Stepping 2, GenuineIntel PROCESSOR_LEVEL=6 PROCESSOR_REVISION=ba02 ProgramData=C:\ProgramData ProgramFiles=C:\Program Files ProgramFiles(x86)=C:\Program Files (x86) ProgramW6432=C:\Program Files PROMPT=$P$G PSModulePath=C:\Program Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules PUBLIC=C:\Users\Public PYBIND11_DIR=C:\Libraries\pybind11 PYTHON_DIR=C:\Users\johan\anaconda3 QtMsBuild=C:\Users\johan\AppData\Local\QtMsBuild QT_DIR=C:\Libraries\Qt\6.11.1\msvc2022_64 SESSIONNAME=Console SystemDrive=C: SystemRoot=C:\WINDOWS TEMP=C:\Users\johan\AppData\Local\Temp TMP=C:\Users\johan\AppData\Local\Temp USERDOMAIN=JRADE-6 USERDOMAIN_ROAMINGPROFILE=JRADE-6 USERNAME=johan USERPROFILE=C:\Users\johan VCPKG_DIR=C:\Libraries\vcpkg\installed\x64-windows windir=C:\WINDOWS ZES_ENABLE_SYSMAN=1 ZLIB-NG_DIR=C:/Libraries/zlib-ng_2_3_3 C:\Users\johan>call C:\Root\root-6.40.02\bin\thisroot.bat C:\Users\johan>root --notebook C:\Users\johan>[I 2026-07-29 11:17:56.634 ServerApp] jupyter_lsp | extension was successfully linked. [I 2026-07-29 11:17:56.638 ServerApp] jupyter_server_terminals | extension was successfully linked. [I 2026-07-29 11:17:56.641 ServerApp] jupyterlab | extension was successfully linked. [W 2026-07-29 11:17:56.642 JupyterNotebookApp] 'extra_static_paths' was found in both NotebookApp and ServerApp. This is likely a recent change. This config will only be set in NotebookApp. Please check if you should also config these traits in ServerApp for your purpose. [I 2026-07-29 11:17:56.644 ServerApp] notebook | extension was successfully linked. [I 2026-07-29 11:17:56.912 ServerApp] notebook_shim | extension was successfully linked. [I 2026-07-29 11:17:56.955 ServerApp] notebook_shim | extension was successfully loaded. [I 2026-07-29 11:17:56.957 ServerApp] jupyter_lsp | extension was successfully loaded. [I 2026-07-29 11:17:56.958 ServerApp] jupyter_server_terminals | extension was successfully loaded. [I 2026-07-29 11:17:56.961 LabApp] JupyterLab extension loaded from C:\Python314\Lib\site-packages\jupyterlab [I 2026-07-29 11:17:56.961 LabApp] JupyterLab application directory is C:\Python314\share\jupyter\lab [I 2026-07-29 11:17:56.961 LabApp] Extension Manager is 'pypi'. [I 2026-07-29 11:17:56.998 ServerApp] jupyterlab | extension was successfully loaded. [I 2026-07-29 11:17:57.002 ServerApp] notebook | extension was successfully loaded. [I 2026-07-29 11:17:57.003 ServerApp] Serving notebooks from local directory: C:\Users\johan [I 2026-07-29 11:17:57.003 ServerApp] Jupyter Server 2.20.0 is running at: [I 2026-07-29 11:17:57.003 ServerApp] http://localhost:8888/tree?token=bb2b04d07f237ec628a95d8f2a844170d5a79d77c557a8bd [I 2026-07-29 11:17:57.003 ServerApp] http://127.0.0.1:8888/tree?token=bb2b04d07f237ec628a95d8f2a844170d5a79d77c557a8bd [I 2026-07-29 11:17:57.003 ServerApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation). [C 2026-07-29 11:17:57.038 ServerApp] To access the server, open this file in a browser: file:/C:/Users/johan/AppData/Roaming/jupyter/runtime/jpserver-16048-open.html Or copy and paste one of these URLs: http://localhost:8888/tree?token=bb2b04d07f237ec628a95d8f2a844170d5a79d77c557a8bd http://127.0.0.1:8888/tree?token=bb2b04d07f237ec628a95d8f2a844170d5a79d77c557a8bd [I 2026-07-29 11:17:57.475 ServerApp] Skipped non-installed server(s): basedpyright, bash-language-server, dockerfile-language-server-nodejs, javascript-typescript-langserver, jedi-language-server, julia-language-server, pyrefly, pyright, python-language-server, python-lsp-server, r-languageserver, sql-language-server, texlab, typescript-language-server, unified-language-server, vscode-css-languageserver-bin, vscode-html-languageserver-bin, vscode-json-languageserver-bin, yaml-language-server [I 2026-07-29 11:18:12.651 ServerApp] Creating new notebook in [I 2026-07-29 11:18:13.175 ServerApp] Saving file at /Untitled5.ipynb [E 2026-07-29 11:18:13.317 ServerApp] Failed to run command: ['python3.11', '-m', 'ROOT._jupyroot.kernel.rootkernel', '-f', 'C:\\Users\\johan\\AppData\\Roaming\\jupyter\\runtime\\kernel-cef46120-6325-4ad3-b115-4b43d3704ac9.json'] PATH='C:/Root/root-6.40.02/bin;C:/Root/root-6.40.02/bin/bin;C:\\Root\\root-6.40.02\\bin;C:\\Root\\root-6.40.02\\bin;C:\\Root\\root-6.40.02\\bin;C:\\Python314\\Scripts\\;C:\\Python314\\;C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\;C:\\Windows\\System32\\OpenSSH\\;C:\\Program Files (x86)\\NVIDIA Corporation\\PhysX\\Common;C:\\Program Files\\Git\\cmd;C:\\Program Files\\dotnet\\;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\Program Files\\NVIDIA Corporation\\NVIDIA app\\NvDLISR;C:\\Program Files (x86)\\Windows Kits\\10\\Windows Performance Toolkit\\;C:\\Program Files\\TortoiseGit\\bin;C:\\Program Files\\CMake\\bin;C:\\Users\\johan\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Users\\johan\\AppData\\Local\\Programs\\Microsoft VS Code\\bin;' with kwargs: {'stdin': -1, 'stdout': None, 'stderr': None, 'cwd': 'C:\\Users\\johan', 'close_fds': False} [E 2026-07-29 11:18:13.321 ServerApp] [WinError 2] The system cannot find the file specified Traceback (most recent call last): File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 107, in wrapper out = await method(self, *args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 527, in _async_start_kernel await self._async_launch_kernel(kernel_cmd, **kw) File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 431, in _async_launch_kernel connection_info = await self.provisioner.launch_kernel(kernel_cmd, **kw) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\provisioning\local_provisioner.py", line 253, in launch_kernel self.process = launch_kernel(cmd, **scrubbed_kwargs) ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\launcher.py", line 173, in launch_kernel raise ex File "C:\Python314\Lib\site-packages\jupyter_client\launcher.py", line 158, in launch_kernel proc = Popen(cmd, **kwargs) # noqa File "C:\Python314\Lib\subprocess.py", line 1039, in __init__ self._execute_child(args, executable, preexec_fn, close_fds, ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ pass_fds, cwd, env, ^^^^^^^^^^^^^^^^^^^ ...<5 lines>... gid, gids, uid, umask, ^^^^^^^^^^^^^^^^^^^^^^ start_new_session, process_group) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\subprocess.py", line 1553, in _execute_child hp, ht, pid, tid = _winapi.CreateProcess(executable, args, ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^ # no special security ^^^^^^^^^^^^^^^^^^^^^ ...<4 lines>... cwd, ^^^^ startupinfo) ^^^^^^^^^^^^ FileNotFoundError: [WinError 2] The system cannot find the file specified [E 2026-07-29 11:18:13.339 ServerApp] [WinError 2] The system cannot find the file specified Traceback (most recent call last): File "C:\Python314\Lib\site-packages\jupyter_client\multikernelmanager.py", line 233, in _add_kernel_when_ready await kernel_awaitable File "C:\Python314\Lib\site-packages\jupyter_core\utils\__init__.py", line 214, in ensure_async result = await obj ^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_server\services\kernels\kernelmanager.py", line 863, in wrapped_method raise err File "C:\Python314\Lib\site-packages\jupyter_server\services\kernels\kernelmanager.py", line 827, in wrapped_method out = await method(self, *args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_server\services\kernels\kernelmanager.py", line 932, in start_kernel return await super().start_kernel(*args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 116, in wrapper raise e File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 107, in wrapper out = await method(self, *args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 527, in _async_start_kernel await self._async_launch_kernel(kernel_cmd, **kw) File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 431, in _async_launch_kernel connection_info = await self.provisioner.launch_kernel(kernel_cmd, **kw) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\provisioning\local_provisioner.py", line 253, in launch_kernel self.process = launch_kernel(cmd, **scrubbed_kwargs) ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\launcher.py", line 173, in launch_kernel raise ex File "C:\Python314\Lib\site-packages\jupyter_client\launcher.py", line 158, in launch_kernel proc = Popen(cmd, **kwargs) # noqa File "C:\Python314\Lib\subprocess.py", line 1039, in __init__ self._execute_child(args, executable, preexec_fn, close_fds, ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ pass_fds, cwd, env, ^^^^^^^^^^^^^^^^^^^ ...<5 lines>... gid, gids, uid, umask, ^^^^^^^^^^^^^^^^^^^^^^ start_new_session, process_group) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\subprocess.py", line 1553, in _execute_child hp, ht, pid, tid = _winapi.CreateProcess(executable, args, ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^ # no special security ^^^^^^^^^^^^^^^^^^^^^ ...<4 lines>... cwd, ^^^^ startupinfo) ^^^^^^^^^^^^ FileNotFoundError: [WinError 2] The system cannot find the file specified [W 2026-07-29 11:18:13.352 ServerApp] 500 POST /api/sessions?1785316693170 (127.0.0.1): [WinError 2] The system cannot find the file specified [W 2026-07-29 11:18:13.363 ServerApp] wrote error: '[WinError 2] The system cannot find the file specified' [E 2026-07-29 11:18:13.367 ServerApp] { "Host": "localhost:8888", "Accept": "*/*", "Referer": "http://localhost:8888/tree", "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0" } [E 2026-07-29 11:18:13.368 ServerApp] 500 POST /api/sessions?1785316693170 (ec374e89da76456d8a7301c8ae52bb2f@127.0.0.1) 175.04ms referer=http://localhost:8888/tree [I 2026-07-29 11:18:14.874 ServerApp] Kernel started: dc306456-e4dd-4650-988d-b51cf93346aa [IPKernelApp] WARNING | Kernel is running over TCP without encryption. All communication (including code and outputs) is sent in plain text and is susceptible to eavesdropping. Use IPC transport or launch with kernel manager-provisioned CurveZMQ keys to enable transport encryption. [I 2026-07-29 11:18:15.943 ServerApp] Adapting from protocol version 5.3 (kernel dc306456-e4dd-4650-988d-b51cf93346aa) to 5.4 (client). [I 2026-07-29 11:18:15.945 ServerApp] Connecting to kernel dc306456-e4dd-4650-988d-b51cf93346aa. [W 2026-07-29 11:18:15.968 ServerApp] The websocket_ping_timeout (90000) cannot be longer than the websocket_ping_interval (30000). Setting websocket_ping_timeout=30000 [I 2026-07-29 11:18:15.974 ServerApp] Adapting from protocol version 5.3 (kernel dc306456-e4dd-4650-988d-b51cf93346aa) to 5.4 (client). [I 2026-07-29 11:18:15.974 ServerApp] Connecting to kernel dc306456-e4dd-4650-988d-b51cf93346aa. [I 2026-07-29 11:18:16.010 ServerApp] Adapting from protocol version 5.3 (kernel dc306456-e4dd-4650-988d-b51cf93346aa) to 5.4 (client). [I 2026-07-29 11:18:16.011 ServerApp] Connecting to kernel dc306456-e4dd-4650-988d-b51cf93346aa. [W 2026-07-29 11:18:16.131 ServerApp] Got events for closed stream [I 2026-07-29 11:18:23.471 ServerApp] Adapting from protocol version 5.3 (kernel dc306456-e4dd-4650-988d-b51cf93346aa) to 5.4 (client). [I 2026-07-29 11:18:23.474 ServerApp] Connecting to kernel dc306456-e4dd-4650-988d-b51cf93346aa. [E 2026-07-29 11:18:24.873 ServerApp] Failed to run command: ['python3.11', '-m', 'ROOT._jupyroot.kernel.rootkernel', '-f', 'C:\\Users\\johan\\AppData\\Roaming\\jupyter\\runtime\\kernel-fa910032-a4c5-40ab-9829-d583738a9a8b.json'] PATH='C:/Root/root-6.40.02/bin;C:/Root/root-6.40.02/bin/bin;C:\\Root\\root-6.40.02\\bin;C:\\Root\\root-6.40.02\\bin;C:\\Root\\root-6.40.02\\bin;C:\\Python314\\Scripts\\;C:\\Python314\\;C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\;C:\\Windows\\System32\\OpenSSH\\;C:\\Program Files (x86)\\NVIDIA Corporation\\PhysX\\Common;C:\\Program Files\\Git\\cmd;C:\\Program Files\\dotnet\\;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\Program Files\\NVIDIA Corporation\\NVIDIA app\\NvDLISR;C:\\Program Files (x86)\\Windows Kits\\10\\Windows Performance Toolkit\\;C:\\Program Files\\TortoiseGit\\bin;C:\\Program Files\\CMake\\bin;C:\\Users\\johan\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Users\\johan\\AppData\\Local\\Programs\\Microsoft VS Code\\bin;' with kwargs: {'stdin': -1, 'stdout': None, 'stderr': None, 'cwd': 'C:\\Users\\johan', 'close_fds': False} [E 2026-07-29 11:18:24.876 ServerApp] [WinError 2] The system cannot find the file specified Traceback (most recent call last): File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 107, in wrapper out = await method(self, *args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 527, in _async_start_kernel await self._async_launch_kernel(kernel_cmd, **kw) File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 431, in _async_launch_kernel connection_info = await self.provisioner.launch_kernel(kernel_cmd, **kw) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\provisioning\local_provisioner.py", line 253, in launch_kernel self.process = launch_kernel(cmd, **scrubbed_kwargs) ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\launcher.py", line 173, in launch_kernel raise ex File "C:\Python314\Lib\site-packages\jupyter_client\launcher.py", line 158, in launch_kernel proc = Popen(cmd, **kwargs) # noqa File "C:\Python314\Lib\subprocess.py", line 1039, in __init__ self._execute_child(args, executable, preexec_fn, close_fds, ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ pass_fds, cwd, env, ^^^^^^^^^^^^^^^^^^^ ...<5 lines>... gid, gids, uid, umask, ^^^^^^^^^^^^^^^^^^^^^^ start_new_session, process_group) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\subprocess.py", line 1553, in _execute_child hp, ht, pid, tid = _winapi.CreateProcess(executable, args, ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^ # no special security ^^^^^^^^^^^^^^^^^^^^^ ...<4 lines>... cwd, ^^^^ startupinfo) ^^^^^^^^^^^^ FileNotFoundError: [WinError 2] The system cannot find the file specified [E 2026-07-29 11:18:24.882 ServerApp] [WinError 2] The system cannot find the file specified Traceback (most recent call last): File "C:\Python314\Lib\site-packages\jupyter_client\multikernelmanager.py", line 233, in _add_kernel_when_ready await kernel_awaitable File "C:\Python314\Lib\site-packages\jupyter_core\utils\__init__.py", line 214, in ensure_async result = await obj ^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_server\services\kernels\kernelmanager.py", line 863, in wrapped_method raise err File "C:\Python314\Lib\site-packages\jupyter_server\services\kernels\kernelmanager.py", line 827, in wrapped_method out = await method(self, *args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_server\services\kernels\kernelmanager.py", line 932, in start_kernel return await super().start_kernel(*args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 116, in wrapper raise e File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 107, in wrapper out = await method(self, *args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 527, in _async_start_kernel await self._async_launch_kernel(kernel_cmd, **kw) File "C:\Python314\Lib\site-packages\jupyter_client\manager.py", line 431, in _async_launch_kernel connection_info = await self.provisioner.launch_kernel(kernel_cmd, **kw) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\provisioning\local_provisioner.py", line 253, in launch_kernel self.process = launch_kernel(cmd, **scrubbed_kwargs) ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\site-packages\jupyter_client\launcher.py", line 173, in launch_kernel raise ex File "C:\Python314\Lib\site-packages\jupyter_client\launcher.py", line 158, in launch_kernel proc = Popen(cmd, **kwargs) # noqa File "C:\Python314\Lib\subprocess.py", line 1039, in __init__ self._execute_child(args, executable, preexec_fn, close_fds, ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ pass_fds, cwd, env, ^^^^^^^^^^^^^^^^^^^ ...<5 lines>... gid, gids, uid, umask, ^^^^^^^^^^^^^^^^^^^^^^ start_new_session, process_group) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python314\Lib\subprocess.py", line 1553, in _execute_child hp, ht, pid, tid = _winapi.CreateProcess(executable, args, ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^ # no special security ^^^^^^^^^^^^^^^^^^^^^ ...<4 lines>... cwd, ^^^^ startupinfo) ^^^^^^^^^^^^ FileNotFoundError: [WinError 2] The system cannot find the file specified [E 2026-07-29 11:18:24.889 ServerApp] Error starting kernel: root [E 2026-07-29 11:18:24.889 ServerApp] { "Host": "localhost:8888", "Accept": "*/*", "Referer": "http://localhost:8888/notebooks/Untitled5.ipynb", "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0" } [E 2026-07-29 11:18:24.890 ServerApp] 501 PATCH /api/sessions/8401b525-1e8a-4bfe-a390-cddef43d6702?1785316704844 (ec374e89da76456d8a7301c8ae52bb2f@127.0.0.1) 43.81ms referer=http://localhost:8888/notebooks/Untitled5.ipynb [I 2026-07-29 11:18:24.893 ServerApp] Starting buffering for dc306456-e4dd-4650-988d-b51cf93346aa:511bb1a4-293e-4429-bea0-f9828b98ba2a