/home/circleci/project/doc/modules/clustering.rst:: WARNING: image file not readable: modules/../auto_examples/cluster/images/sphx_glr_plot_optics_001.png
/home/circleci/project/doc/modules/clustering.rst:: WARNING: image file not readable: modules/../auto_examples/cluster/images/sphx_glr_plot_optics_001.png

LaTeX Warning: File `{modules/../auto_examples/cluster/images/sphx_glr_plot_opt
ics_001}.png' not found on input line 2.


LaTeX Warning: File `{modules/../auto_examples/cluster/images/sphx_glr_plot_opt
ics_001}.png' not found on input line 2.


! Package pdftex.def Error: File `modules/../auto_examples/cluster/images/sphx_
glr_plot_optics_001.png' not found.

See the pdftex.def package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.25435 .../images/sphx_glr_plot_optics_001}.png}}
                                                  ^^M
!  ==> Fatal error occurred, no output PDF file produced!
Transcript written on user_guide.log.
Latexmk: Index file 'user_guide.idx' was written
Latexmk: Missing input file: '{modules/../auto_examples/cluster/images/sphx_glr_plot_optics_001}.png' from line
  'LaTeX Warning: File `{modules/../auto_examples/cluster/images/sphx_glr_plot_optics_001}.png' not found on input line 2.'
Latexmk: Missing input file: '{modules/../auto_examples/cluster/images/sphx_glr_plot_optics_001}.png' from line
  'LaTeX Warning: File `{modules/../auto_examples/cluster/images/sphx_glr_plot_optics_001}.png' not found on input line 2.'
Collected error summary (may duplicate other messages):
  pdflatex: Command for 'pdflatex' gave return code 256
Latexmk: Use the -f option to force complete processing,
 unless error was exceeding maximum runs of latex/pdflatex.
Latexmk: Errors, so I did not complete making targets
Makefile:33: recipe for target 'user_guide.pdf' failed
make[1]: *** [user_guide.pdf] Error 12
make[1]: Leaving directory '/home/circleci/project/doc/_build/latex'
Makefile:79: recipe for target 'latexpdf' failed
make: *** [latexpdf] Error 2
Exited with code 2

WARNING: /home/circleci/project/doc/modules/generated/sklearn.utils.arrayfuncs.cholesky_delete.rst:6: (WARNING/2) autodoc: failed to import function 'cholesky_delete' from module 'arrayfuncs'; the following exception was raised:
Traceback (most recent call last):
  File "/home/circleci/miniconda/envs/testenv/lib/python3.6/site-packages/Sphinx-1.6.2-py3.6.egg/sphinx/ext/autodoc.py", line 657, in import_object
    __import__(self.modname)
ModuleNotFoundError: No module named 'arrayfuncs'