# ValueError: All picks must be \< n\_channels (73), got 73 **URL:** \ **Category:** Support & Discussions\ **Tags:** eeg\ **Created:** [August 15, 2023, 10:16pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375 "2023-08-15T22:16:03Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![RPathak](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@RPathak](https://mne.discourse.group/u/RPathak)\ **Post date:** [August 18, 2023, 5:10pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/22 "2023-08-18T17:10:16Z")
@drammock, sorry for the late reply. Sometimes I don’t get reply notifications. And sorry for the long reply. mne.sys\_info() yields the following. ```python Platform Windows-10-10.0.19045-SP0 Python 3.9.5 (tags/v3.9.5:0a7dcbd, May 3 2021, 17:27:52) [MSC v.1928 64 bit (AMD64)] Executable c:\users\raahul pathak\appdata\local\programs\python\python39\python.exe CPU AMD64 Family 23 Model 113 Stepping 0, AuthenticAMD (24 cores) Memory 15.9 GB --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) in 1 # p01_raw = mne.io.read_raw_bdf(p01) ----> 2 mne.sys_info() c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages\mne\utils\config.py in sys_info(fid, show_paths, dependencies, unicode) 628 out("\n") 629 ljust -= 3 # account for +/- symbols --> 630 libs = _get_numpy_libs() 631 unavailable = [] 632 use_mod_names = ( c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages\mne\utils\config.py in _get_numpy_libs() 544 except Exception as exc: 545 return bad_lib + f" (threadpoolctl module not found: {exc})" --> 546 pools = threadpool_info() 547 rename = dict( 548 openblas="OpenBLAS", c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages\threadpoolctl.py in threadpool_info() 122 In addition, each module may contain internal_api specific entries. 123 """ --> 124 return _ThreadpoolInfo(user_api=_ALL_USER_APIS).todicts() 125 126 c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages\threadpoolctl.py in __init__ (self, user_api, prefixes, modules) 338 339 self.modules = [] --> 340 self._load_modules() 341 self._warn_if_incompatible_openmp() 342 else: c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages\threadpoolctl.py in _load_modules(self) 371 self._find_modules_with_dyld() 372 elif sys.platform == "win32": --> 373 self._find_modules_with_enum_process_module_ex() 374 else: 375 self._find_modules_with_dl_iterate_phdr() c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages\threadpoolctl.py in _find_modules_with_enum_process_module_ex(self) 483 484 # Store the module if it is supported and selected --> 485 self._make_module_from_path(filepath) 486 finally: 487 kernel_32.CloseHandle(h_process) c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages\threadpoolctl.py in _make_module_from_path(self, filepath) 513 if prefix in self.prefixes or user_api in self.user_api: 514 module_class = globals()[module_class] --> 515 module = module_class(filepath, prefix, user_api, internal_api) 516 self.modules.append(module) 517 c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages\threadpoolctl.py in __init__ (self, filepath, prefix, user_api, internal_api) 604 self.internal_api = internal_api 605 self._dynlib = ctypes.CDLL(filepath, mode=_RTLD_NOLOAD) --> 606 self.version = self.get_version() 607 self.num_threads = self.get_num_threads() 608 self._get_extra_info() c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages\threadpoolctl.py in get_version(self) 644 lambda: None) 645 get_config.restype = ctypes.c_char_p --> 646 config = get_config().split() 647 if config[0] == b"OpenBLAS": 648 return config[1].decode("utf-8") AttributeError: 'NoneType' object has no attribute 'split' ``` However, if I run !pip list on Jupyter it yields package names and versions. ```python !pip list Package Version ----------------------- ------------------- absl-py 0.12.0 anyio 3.2.0 appdirs 1.4.4 argon2-cffi 20.1.0 astunparse 1.6.3 async-generator 1.10 attrs 21.2.0 backcall 0.2.0 beautifulsoup4 4.11.1 bleach 3.3.0 blis 0.7.8 bokeh 3.1.1 cachetools 4.2.2 catalogue 2.0.8 certifi 2021.5.30 cffi 1.14.5 chardet 4.0.0 click 8.1.3 cloudpickle 2.2.1 colorama 0.4.4 contourpy 1.0.7 cycler 0.10.0 cymem 2.0.6 Cython 0.29.28 dataPreprocess 0.2.7 daytime 0.4 decorator 5.0.9 WARNING: Ignoring invalid distribution -illow (c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages) WARNING: Ignoring invalid distribution -illow (c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages) WARNING: Ignoring invalid distribution -illow (c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages) WARNING: Ignoring invalid distribution -illow (c:\users\raahul pathak\appdata\local\programs\python\python39\lib\site-packages) [notice] A new release of pip is available: 23.0.1 -> 23.2.1 [notice] To update, run: c:\Users\Raahul Pathak\AppData\Local\Programs\Python\Python39\python.exe -m pip install --upgrade pip defusedxml 0.7.1 entrypoints 0.3 flatbuffers 1.12 fsspec 2023.5.0 gast 0.4.0 gensim 4.2.0 gitdb 4.0.7 GitPython 3.1.18 google-auth 1.30.1 google-auth-oauthlib 0.4.4 google-pasta 0.2.0 graphviz 0.16 grpcio 1.34.1 h5py 3.1.0 hdbscan 0.8.29 idna 2.10 importlib-metadata 6.6.0 inflect 6.0.0 ipykernel 5.5.5 ipython 7.23.1 ipython-genutils 0.2.0 ipywidgets 7.6.3 jedi 0.18.0 Jinja2 3.0.1 joblib 1.0.1 jsonschema 3.2.0 jupyter 1.0.0 jupyter-client 6.1.12 jupyter-console 6.4.0 jupyter-core 4.7.1 jupyter-server 1.8.0 jupyter-server-mathjax 0.2.3 jupyterlab-git 0.30.1 jupyterlab-pygments 0.1.2 jupyterlab-widgets 1.0.0 Keras 2.4.3 keras-nightly 2.5.0.dev2021032900 Keras-Preprocessing 1.1.2 kiwisolver 1.3.1 langcodes 3.3.0 lazy_loader 0.2 linkify-it-py 2.0.2 llvmlite 0.40.0 locket 1.0.0 logging 0.4.9.6 Markdown 3.3.4 MarkupSafe 2.0.1 mat 1.0.2 matplotlib 3.4.2 matplotlib-inline 0.1.2 mdurl 0.1.2 mistune 0.8.4 mne 1.5.0 mneflow 0.4.0 multipledispatch 0.6.0 murmurhash 1.0.8 mysql-connector-python 8.0.32 nbclient 0.5.3 nbconvert 6.0.7 nbdime 3.1.0 nbformat 5.1.3 nest-asyncio 1.5.1 networkx 3.1 nltk 3.7 notebook 6.4.0 numba 0.57.0 numpy 1.22.4 oauthlib 3.1.1 opt-einsum 3.3.0 packaging 23.1 pandas 2.0.1 pandocfilters 1.4.3 param 1.13.0 parso 0.8.2 partd 1.4.0 pathy 0.6.2 pexpect 4.8.0 pickleshare 0.7.5 Pillow 9.5.0 pip 23.0.1 plotly 5.10.0 pooch 1.6.0 preshed 3.0.7 prometheus-client 0.10.1 prompt-toolkit 3.0.18 protobuf 3.17.2 psutil 5.9.5 ptyprocess 0.7.0 pyasn1 0.4.8 pyasn1-modules 0.2.8 pycosat 0.6.3 pycparser 2.20 pyct 0.5.0 pydantic 1.9.2 pydot 1.4.2 Pygments 2.9.0 pynndescent 0.5.10 pyparsing 2.4.7 PyQt6 6.3.1 PyQt6-Qt6 6.3.1 PyQt6-sip 13.4.0 pyriemann 0.4 pyrsistent 0.17.3 pyspellchecker 0.6.3 python-dateutil 2.8.2 pytz 2021.1 pyviz-comms 2.3.0 PyWavelets 1.4.1 pywin32 300 pywinpty 1.1.1 PyYAML 5.4.1 pyzmq 22.1.0 qtconsole 5.1.0 QtPy 1.9.0 regex 2022.8.17 requests 2.25.1 requests-oauthlib 1.3.0 rsa 4.7.2 scikit-learn 0.24.2 scipy 1.9.1 seaborn 0.11.1 Send2Trash 1.5.0 sequence 0.3.4 setuptools 63.2.0 six 1.15.0 sklearn 0.0 smart-open 5.2.1 smmap 4.0.0 sniffio 1.2.0 soupsieve 2.3.2.post1 spacy 3.4.1 spacy-legacy 3.0.10 spacy-loggers 1.0.3 srsly 2.4.4 tabulate 0.9.0 tenacity 8.0.1 tensorboard 2.5.0 tensorboard-data-server 0.6.1 tensorboard-plugin-wit 1.8.0 tensorflow 2.5.0 tensorflow-estimator 2.5.0 termcolor 1.1.0 terminado 0.10.0 testpath 0.5.0 thinc 8.1.0 threadpoolctl 2.1.0 tifffile 2023.4.12 toolz 0.12.0 torch 1.12.0 tornado 6.1 tqdm 4.64.0 trainer 0.0.1 traitlets 5.0.5 typer 0.4.2 typing-extensions 3.7.4.3 tzdata 2023.3 uc-micro-py 1.0.2 umap-learn 0.5.3 Unidecode 1.3.4 urllib3 1.26.5 utils 1.0.1 wasabi 0.10.1 wcwidth 0.2.5 webencodings 0.5.1 websocket-client 1.1.0 Werkzeug 2.0.1 wheel 0.37.1 widgetsnbextension 3.5.1 word2number 1.1 wrapt 1.12.1 xyzservices 2023.5.0 zipp 3.15 ``` ---
**Author:** ![RPathak](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@RPathak](https://mne.discourse.group/u/RPathak)\ **Post date:** [August 18, 2023, 5:19pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/23 "2023-08-18T17:19:14Z")
Oh. I got the notification, but must’ve dismissed it by accident. ---
**Author:** ![drammock](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/drammock/32/4_2.png) [@drammock](https://mne.discourse.group/u/drammock)\ **Post date:** [August 18, 2023, 8:56pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/24 "2023-08-18T20:56:35Z")
if `mne.sys_info()` is failing then something is deeply wrong with the install environment. Can you try either [using our standalone installer](https://mne.tools/dev/install/installers.html), or [reinstalling in a new virtual environment](https://mne.tools/dev/install/manual_install.html)? If I’m reading correctly I think you’re running this in a Jupyter Notebook, so after the reinstall make sure you select the right kernel for your notebook (the one associated with the new MNE-containing environment). ---
**Author:** ![RPathak](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@RPathak](https://mne.discourse.group/u/RPathak)\ **Post date:** [August 18, 2023, 9:25pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/25 "2023-08-18T21:25:40Z")
Can you please re-send the github link? It says the page was not found. Your hyperlink redirects to this link. [https://mne.tools/dev/install/manual\_install.htm](https://mne.tools/dev/install/manual_install.htm) ---
**Author:** ![drammock](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/drammock/32/4_2.png) [@drammock](https://mne.discourse.group/u/drammock)\ **Post date:** [August 18, 2023, 9:40pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/26 "2023-08-18T21:40:02Z")
oops, the final L in “HTML” got lost in the copy-paste. I’ve edited the previous post to fix the link ---
**Author:** ![RPathak](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@RPathak](https://mne.discourse.group/u/RPathak)\ **Post date:** [August 19, 2023, 4:22pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/27 "2023-08-19T16:22:00Z")
@drammock, is there a way I can virtually talk to you? I know that is a hard/weird/big ask, but I am struggling to all hell with everything and I feel that this can be resolved much more quickly and easily if we do this live. ---
**Author:** ![scott-huberty](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/scott-huberty/32/2715_2.png) [@scott-huberty](https://mne.discourse.group/u/scott-huberty)\ **Post date:** [August 19, 2023, 4:28pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/28 "2023-08-19T16:28:19Z")
Hi @RPathak there are bi-weekly live office hours, every other Friday at 15:00 UTC, that the MNE devs attend to help users with specific questions. The last office hour was yesterday actually, so the next one should be **Friday September 1st at 15:00 UTC**. Sorry if that’s a long wait, but it may be the best opportunity for you to get some live help! ---
**Author:** ![RPathak](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@RPathak](https://mne.discourse.group/u/RPathak)\ **Post date:** [August 19, 2023, 4:40pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/29 "2023-08-19T16:40:22Z")
Is there a way I can schedule a special office hour for earlier with someone? I really need this as a fast as I can because this is my thesis project for my master’s degree. ---
**Author:** ![RPathak](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@RPathak](https://mne.discourse.group/u/RPathak)\ **Post date:** [August 19, 2023, 4:56pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/30 "2023-08-19T16:56:22Z")
This is not a jab at you or anyone in particular so please don’t take it harshly, but I, nor anyone new to the MNE forum would think that you have live office hours. And, if you did tell new people at the beginning or at any time, it was not told/reminded to them as often as it should be to remind them about the office hours. This is just feedback but you need to tell it to everyone at the beginning of the posts and more often so if they need it, they can go to it. I was free and just waiting for responses/struggling to get things to work yesterday. I would’ve done everything I could to make the live office hours had I known they existed and had I known what time they were. But, I didn’t think that MNE had live hours because not many forums at all have live support. Sorry for the rant, but this is very annoying at how it was not communicated well to me about the live support. ---
**Author:** ![drammock](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/drammock/32/4_2.png) [@drammock](https://mne.discourse.group/u/drammock)\ **Post date:** [August 19, 2023, 5:26pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/31 "2023-08-19T17:26:37Z")
> [@RPathak](#): > > I, nor anyone new to the MNE forum would think that you have live office hours. We have not been good at announcing them recently. Looks like the most recent announcement was in June (2 months ago): [Next online office hour today, June 9](https://mne.discourse.group/t/next-online-office-hour-today-june-9/7054) So contrary to your strongly worded assumption about what “anyone new to the forum” would know, in fact most people new to the forum hear about the office hours within a couple weeks. I’m sorry if you joined in the last 2 months and didn’t hear about them right away. I won’t take the time to explain exactly _why_ announcements have slipped lately or _why_ I don’t have time to arrange a special meeting just for you, but please think about the fact that _almost everyone else here_ is also in academia and also has deadlines of their own to manage, and almost all are answering forum questions as a volunteer activity (exactly 2 people support MNE _as part of their job_ and neither of them do it full-time). ---
**Author:** ![drammock](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/drammock/32/4_2.png) [@drammock](https://mne.discourse.group/u/drammock)\ **Post date:** [August 19, 2023, 5:34pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/32 "2023-08-19T17:34:32Z")
If you want further help, please try one or more of these things: 1. use a standalone installer for version 1.5.0 (just released a couple days ago, and there’s a report that it might be buggy on macOS, not sure about windows) 2. use a standalone installer for version 1.4.2 (widely tested on all platforms) 3. follow the manual install instructions I linked previously, for creating a new virtual environment yourself and running MNE in that virtual environment. If they all fail, report back what went wrong and we’ll continue trying to help solve it. I would also recommend to test out in a plain IPython interpreter rather than a Jupyter notebook — at least at first. Jupyter notebooks adds an extra layer where things might get configured wrong, so it’s better to work up to it (make sure plain terminal IPython works first) rather than starting with notebooks. ---
**Author:** ![RPathak](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@RPathak](https://mne.discourse.group/u/RPathak)\ **Post date:** [August 19, 2023, 5:57pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/33 "2023-08-19T17:57:15Z")
Okay. Let me try to install the standalone one more time. I will uninstall everything MNE-based, and try to do it from scratch one more time. I thought I did that last time, but I’ll try one more time. I will keep you updated on it. I tried to do it with MNE 1.5.0 earlier when you helped me. Let me try one more time with 1.5.0. And, I’m sorry for the strongly worded message. When I typed that, it was a mixture of emotions and also annoyance at how the live support were yesterday. I never thought a forum would have live support, so there was a lot of emotions going on. Thank you for dealing with the strongly worded message I put up. I will keep you updated on everything. ---
**Author:** ![RPathak](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@RPathak](https://mne.discourse.group/u/RPathak)\ **Post date:** [August 19, 2023, 8:12pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/34 "2023-08-19T20:12:05Z")
Would a space in the user directory make any of the MNE conda packages not work properly? When I am installing MNE, it says a space in my directory path may cause some conda packages to not work. It hasn’t been a problem until now, but I am unsure if MNE falls under that list of “not working” conda packages. What I mean is, part of my directory path is C:\Users\Raahul Pathak.… ---
**Author:** ![RPathak](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@RPathak](https://mne.discourse.group/u/RPathak)\ **Post date:** [August 19, 2023, 10:16pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/35 "2023-08-19T22:16:35Z")
Okay, so, we have good news and we have bad news. The good news is, after installing MNE via admin due to the whole space thing with my path, I ran sys\_info() on Spyder(MNE) and it did not give me an attribute error. I know at the very beginning you wanted the stuff from sys\_info() to help troubleshoot the initial problem, so here is the output to sys\_info() ```python runfile('C:/Users/Raahul Pathak/.spyder-py3/temp.py', wdir='C:/Users/Raahul Pathak/.spyder-py3') Platform Windows-10-10.0.19045-SP0 Python 3.11.4 | packaged by conda-forge | (main, Jun 10 2023, 17:59:51) [MSC v.1935 64 bit (AMD64)] Executable C:\ProgramData\mne-python\1.5.0_0\python.exe CPU AMD64 Family 23 Model 113 Stepping 0, AuthenticAMD (24 cores) Memory 15.9 GB Core ├☑ mne 1.5.0 ├☑ numpy 1.24.4 (MKL 2022.1-Product with 12 threads) ├☑ scipy 1.11.1 ├☑ matplotlib 3.7.2 (backend=module://ipympl.backend_nbagg) ├☑ pooch 1.7.0 └☑ jinja2 3.1.2 Numerical (optional) ├☑ sklearn 1.3.0 ├☑ numba 0.57.1 ├☑ nibabel 5.1.0 ├☑ nilearn 0.10.1 ├☑ dipy 1.7.0 ├☑ openmeeg 2.5.6 ├☑ pandas 2.0.3 └☐ unavailable cupy Visualization (optional) ├☑ pyvista 0.41.1C:\ProgramData\mne-python\1.5.0_0\Lib\site-packages\threadpoolctl.py:1010: RuntimeWarning: Found Intel OpenMP ('libiomp') and LLVM OpenMP ('libomp') loaded at the same time. Both libraries are known to be incompatible and this can cause random crashes or deadlocks on Linux when loaded in the same Python program. Using threadpoolctl may cause crashes or deadlocks. For more information and possible workarounds, please see https://github.com/joblib/threadpoolctl/blob/master/multiple_openmp.md warnings.warn(msg, RuntimeWarning) (OpenGL 4.5.0 NVIDIA 536.23 via NVIDIA GeForce RTX 2080 SUPER/PCIe/SSE2) ├☑ pyvistaqt 0.0.0 ├☑ ipyvtklink 0.2.2 ├☑ vtk 9.2.6 ├☑ qtpy 2.3.1 (PyQt5=5.15.8) ├☑ ipympl 0.9.3 ├☑ pyqtgraph 0.13.3 └☑ mne-qt-browser 0.5.2 Ecosystem (optional) ├☑ mne-bids 0.12 ├☑ mne-nirs 0.5.0 ├☑ mne-features 0.2.1 ├☑ mne-connectivity 0.5.0 ├☑ mne-bids-pipeline 1.4.0 └☐ unavailable mne-icalabel ``` The bad news is loading in the file and trying to create the raw.info structure is still stopping somewhere. I ran mne.io.read\_raw\_bdf() on the p01 file and let it run for twelve to thirteen minutes. And nothing happened. It was still creating it. Here is the output to the following lines: Lines: ```python p01 = "C:/Users/Raahul Pathak/Research/Raahul/Thesis-Project/Participant-Information/p1.bdf" p01_raw = mne.io.read_raw_bdf(p01) ``` Output ```python runfile('C:/Users/Raahul Pathak/.spyder-py3/temp.py', wdir='C:/Users/Raahul Pathak/.spyder-py3') Extracting EDF parameters from C:\Users\Raahul Pathak\Research\Raahul\Thesis-Project\Participant-Information\p1.bdf... BDF file detected Setting channel info structure... Creating raw.info structure... ``` All of this is being done on Spyder(MNE) and all is being done on a temporary file/directory because I just wanted to see if it would load in the data. ---
**Author:** ![mscheltienne](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/mscheltienne/32/827_2.png) [@mscheltienne](https://mne.discourse.group/u/mscheltienne)\ **Post date:** [August 20, 2023, 9:04am UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/36 "2023-08-20T09:04:58Z")
OK, so it’s good that you are now using Spyder instead of Jupyter, it’s simpler. And your install now “works”. Could you now share the file, e.g. on a OneDrive, GoogleDrive, whatever, so that we can try to load it on our side any determine if there is something wrong with the file, if there is something wrong with how we read the file, or if there is something hanging your python interpreter. Mathieu ---
**Author:** ![mscheltienne](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/mscheltienne/32/827_2.png) [@mscheltienne](https://mne.discourse.group/u/mscheltienne)\ **Post date:** [August 20, 2023, 9:08am UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/37 "2023-08-20T09:08:06Z")
Also @drammock instead of announcements of the next office hours, how about a permanent banner saying: “Live office hours bi-weekly on Fridays 15h UTC on Discord (with link)” + a link to a google calendar/iCal subscription to the bi-weekly event? ---
**Author:** ![RPathak](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@RPathak](https://mne.discourse.group/u/RPathak)\ **Post date:** [August 20, 2023, 11:59am UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/38 "2023-08-20T11:59:42Z")
This is one of the twelve bdf files I am trying to load in. This is the initial one that I tried which started this whole thing. I tried the second file I want to load in and the same error happened. > **[p1.bdf](https://drive.google.com/file/d/1b59-O5AHmCkW52inbDkafcf2iQEDcGkj/view?usp=sharing)** > > Google Drive file. ---
**Author:** ![mscheltienne](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/mscheltienne/32/827_2.png) [@mscheltienne](https://mne.discourse.group/u/mscheltienne)\ **Post date:** [August 20, 2023, 4:11pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/39 "2023-08-20T16:11:51Z")
I can load and plot it fine. ```python from mne.io import read_raw raw = read_raw("p1.bdf") raw.load_data() raw.plot() ``` Whatever is going on is sadly on your side only. Mathieu ---
**Author:** ![drammock](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/drammock/32/4_2.png) [@drammock](https://mne.discourse.group/u/drammock)\ **Post date:** [August 21, 2023, 2:23pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/40 "2023-08-21T14:23:32Z")
Please double-check a few things: 1. in spyder, go to `tools > preferences` and select the `Python interpreter` section. There are two choices, “default (same as spyder)” and “use the following python interpreter”. Select the second one and paste the Python executable from your `mne.sys_info()` output in there (`C:\ProgramData\mne-python\1.5.0_0\python.exe`). Save the setting, then close and restart Spyder. 2. in the integrated ipython console type `import sys; print(sys.executable)` and tell us what it says 3. try pasting this directly into the integrated terminal rather than using the “runfile” command: ```python import mne fname = "C:\Users\Raahul Pathak\Research\Raahul\Thesis-Project\Participant-Information\p1.bdf" raw = mne.io.read_raw_bdf(fname) ``` ---
**Author:** ![cbrnr](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/cbrnr/32/1409_2.png) [@cbrnr](https://mne.discourse.group/u/cbrnr)\ **Post date:** [August 21, 2023, 3:24pm UTC](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375/41 "2023-08-21T15:24:04Z")
You need to use `/` instead of `\` in the `fname` string, or a raw string. [Previous page](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375.md?page=1) [Next page](https://mne.discourse.group/t/valueerror-all-picks-must-be-n-channels-73-got-73/7375.md?page=3)