# \ **URL:** \ **Category:** Mailing List Archive (read-only)\ **Tags:** list-archive\ **Created:** [September 1, 2016, 10:37am UTC](https://mne.discourse.group/t/maybeencodingerror/1076 "2016-09-01T10:37:46Z")\ **Posts on this page:** 4\ **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:** [September 1, 2016, 10:37am UTC](https://mne.discourse.group/t/maybeencodingerror/1076/1 "2016-09-01T10:37:46Z")
Dear list I have been trying to reconstruct my epochs based on the induced power using \. I get a \ from running this command. I cannot figure out whether this is a user error or a bug/problem. I have been able to use the exact same code on other files though with shorter epochs (-250 to 750 ms) mne.minimum\_norm.time\_frequency.source\_band\_induced\_power(                              to\_reconstruct[trial\_type], ## epochs are from -500 to 1500 ms                              inverse\_operator, mu\_bands, method=method,                              n\_cycles=3, n\_jobs=16) Preparing the inverse operator for use...      Scaled noise and source covariance from nave = 1 to nave = 1      Created the regularized inverter      The projection vectors do not apply to these channels.      Created the whitener using a full noise covariance matrix (0 small eigenvalues omitted)      Computing noise-normalization factors (dSPM)... [done] Picked 306 channels from the data Computing inverse... (eigenleads need to be weighted)... Reducing data rank to 306 Computing source power ... Traceback (most recent call last):    File "\", line 1, in \ runfile('/home/lau/analyses/pam\_oddball/scripts/absence/python/absence\_analysis\_v2.py', wdir='/home/lau/analyses/pam\_oddball/scripts/absence/python')    File "/home/lau/anaconda2/lib/python2.7/site-packages/spyderlib/widgets/externalshell/sitecustomize.py", line 685, in runfile      execfile(filename, namespace)    File "/home/lau/anaconda2/lib/python2.7/site-packages/spyderlib/widgets/externalshell/sitecustomize.py", line 78, in execfile      builtins.execfile(filename, \*where)    File "/home/lau/analyses/pam\_oddball/scripts/absence/python/absence\_analysis\_v2.py", line 378, in \      mu\_bands)    File "absence\_functions\_v2.py", line 835, in source\_estimate      n\_cycles=7, n\_jobs=4)    File "\", line 2, in source\_band\_induced\_power    File "/home/lau/anaconda2/lib/python2.7/site-packages/mne/utils.py", line 628, in verbose      return function(\*args, \*\*kwargs)    File "/home/lau/anaconda2/lib/python2.7/site-packages/mne/minimum\_norm/time\_frequency.py", line 129, in source\_band\_induced\_power      prepared=prepared)    File "\", line 2, in \_source\_induced\_power    File "/home/lau/anaconda2/lib/python2.7/site-packages/mne/utils.py", line 628, in verbose      return function(\*args, \*\*kwargs)    File "/home/lau/anaconda2/lib/python2.7/site-packages/mne/minimum\_norm/time\_frequency.py", line 275, in \_source\_induced\_power      for data in np.array\_split(epochs\_data, n\_jobs))    File "/home/lau/anaconda2/lib/python2.7/site-packages/sklearn/externals/joblib/parallel.py", line 666, in \_\_call\_\_      self.retrieve()    File "/home/lau/anaconda2/lib/python2.7/site-packages/sklearn/externals/joblib/parallel.py", line 518, in retrieve      self.\_output.append(job.get())    File "/home/lau/anaconda2/lib/python2.7/multiprocessing/pool.py", line 567, in get      raise self.\_value \*MaybeEncodingError\*: Error sending result: '(array([[[ 4.33156061e-20, 4.39577027e-20, 4.45972043e-20, ..., -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20160901/aeb62dce/attachment.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20160901/aeb62dce/attachment.html) ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [September 1, 2016, 10:45am UTC](https://mne.discourse.group/t/maybeencodingerror/1076/2 "2016-09-01T10:45:37Z")
quick update - I suspected that it might be due to parallel processing (n\_jobs=16), but I get the same error with n\_jobs=1 I use mne 0.12 by the way ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [September 1, 2016, 1:35pm UTC](https://mne.discourse.group/t/maybeencodingerror/1076/3 "2016-09-01T13:35:36Z")
can you share the tracback with n\_jobs=1? it should be more readable. A ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [September 9, 2016, 7:46am UTC](https://mne.discourse.group/t/maybeencodingerror/1076/4 "2016-09-09T07:46:39Z")
It might be an n\_jobs problem - didn't get the error with n\_jobs=1