# possible problem with raw.plot() **URL:** \ **Category:** Mailing List Archive (read-only)\ **Tags:** list-archive\ **Created:** [August 12, 2020, 4:50pm UTC](https://mne.discourse.group/t/possible-problem-with-raw-plot/2286 "2020-08-12T16:50:21Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [August 12, 2020, 4:50pm UTC](https://mne.discourse.group/t/possible-problem-with-raw-plot/2286/1 "2020-08-12T16:50:21Z")
External Email - Use Caution I am getting an error when using raw.plot with either fif or edf files. Sample code and output below. Is this a bug or am I missing something? FWIW I get the same error with python 3.8.5 Sample code (shortened from [https://mne.tools/stable/auto\_examples/io/plot\_read\_and\_write\_raw\_data.html#sphx-glr-auto-examples-io-plot-read-and-write-raw-data-py](https://mne.tools/stable/auto_examples/io/plot_read_and_write_raw_data.html#sphx-glr-auto-examples-io-plot-read-and-write-raw-data-py)): import matplotlib.pyplot as plt import mne from mne.datasets import sample data\_path = sample.data\_path() fname = data\_path + '/MEG/sample/sample\_audvis\_raw.fif' raw = mne.io.read\_raw\_fif(fname) print(mne.sys\_info()) raw.plot() plt.show() Output: Opening raw data file C:\Users\leisenman\mne\_data\MNE-sample-data/MEG/sample/sample\_audvis\_raw.fif...     Read a total of 3 projection items:         PCA-v1 (1 x 102) idle         PCA-v2 (1 x 102) idle         PCA-v3 (1 x 102) idle     Range : 25800 ... 192599 = 42.956 ... 320.670 secs Ready. Current compensation grade : 0 Platform: Windows-10-10.0.10240-SP0 Python: 3.7.8 | packaged by conda-forge | (default, Jul 31 2020, 01:53:57) [MSC v.1916 64 bit (AMD64)] Executable: C:\Users\leisenman\AppData\Local\Continuum\miniconda3\envs\mne7\python.exe CPU: Intel64 Family 6 Model 142 Stepping 9, GenuineIntel: 4 cores Memory: 7.7 GB mne: 0.20.7 numpy: 1.19.1 {blas=blas, lapack=blas} scipy: 1.5.0 matplotlib: 3.3.0 {backend=Qt5Agg} sklearn: 0.23.2 numba: 0.50.1 nibabel: 3.1.1 cupy: Not found pandas: 1.1.0 dipy: 1.1.0 mayavi: 4.7.1 {qt\_api=pyqt5, PyQt5=5.12.3} pyvista: 0.25.3 vtk: 8.2.0 None Traceback (most recent call last):   File "c:\Users\leisenman\Box\Python\testedf\test\_mne\_raw.py", line 33, in \     raw.plot()   File "C:\Users\leisenman\AppData\Local\Continuum\miniconda3\envs\mne7\lib\site-packages\mne\io\base.py", line 1378, in plot     show\_scalebars=show\_scalebars, verbose=verbose)   File "\", line 21, in plot\_raw   File "C:\Users\leisenman\AppData\Local\Continuum\miniconda3\envs\mne7\lib\site-packages\mne\viz\raw.py", line 415, in plot\_raw     n\_channels)   File "C:\Users\leisenman\AppData\Local\Continuum\miniconda3\envs\mne7\lib\site-packages\mne\viz\raw.py", line 722, in \_prepare\_mne\_browse\_raw     ax.set\_yticklabels(['X' \* max([len(ch) for ch in info['ch\_names']])])   File "C:\Users\leisenman\AppData\Local\Continuum\miniconda3\envs\mne7\lib\site-packages\matplotlib\axes\_base.py", line 63, in wrapper     return get\_method(self)(\*args, \*\*kwargs)   File "C:\Users\leisenman\AppData\Local\Continuum\miniconda3\envs\mne7\lib\site-packages\matplotlib\cbook\deprecation.py", line 451, in wrapper     return func(\*args, \*\*kwargs)   File "C:\Users\leisenman\AppData\Local\Continuum\miniconda3\envs\mne7\lib\site-packages\matplotlib\axis.py", line 1793, in \_set\_ticklabels     return self.set\_ticklabels(labels, minor=minor, \*\*kwargs)   File "C:\Users\leisenman\AppData\Local\Continuum\miniconda3\envs\mne7\lib\site-packages\matplotlib\axis.py", line 1715, in set\_ticklabels     "The number of FixedLocator locations" ValueError: The number of FixedLocator locations (20), usually from a call to set\_ticks, does not match the number of ticklabels (1). Larry ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [August 12, 2020, 5:33pm UTC](https://mne.discourse.group/t/possible-problem-with-raw-plot/2286/2 "2020-08-12T17:33:23Z")
External Email - Use Caution This is indeed a bug, it has been fixed in the development branch of MNE and will be part of the next release (scheduled for middle of September). Eric