wrong-type-argument listp when exporting example file

[andreas-h]

I'm trying to get this to work, but am running into issues with the example file.

I have this in my init.el:

(load-file "~/.emacs.d/external/ox-ipynb/ox-ipynb.el")
(require 'ox-ipynb)

Now, when I open the example.org file and press C-c C-e n b, I get the following error:

Debugger entered--Lisp error: (wrong-type-argument listp #("John Kitchin" 0 12 (:parent (#1))))
  org-element-set-contents(#("John Kitchin" 0 12 (:parent (#0))))
  apply(org-element-set-contents #("John Kitchin" 0 12 (:parent (#0))) nil)
  #[257 "\211\305\306\307�#��\310\311�\211�:\204��\312\202\"�\n@9\203!�\nAA\202\"�\n)\"\210\313\314	�\211�:\2043�\312\202@�\n@9\203?�\nAA\202@�\n)#\210�\315\211	��\n;\203V�\316\317�\n#\202\\�\320\nA@�\"*��\211�;\203n�\321\n\312�\f$\202z�\nA\322\nA@�\f#\240\210\n+\210	A�A@\240\210	�@\240*\207" [new old element property value replace-regexp-in-string "\n" " " mapc #[(blob) "�\305	��\211�;\203��\306\f\307�\n$\202 �\fA\310\fA@�\n#\240\210\f+\207" [blob old value property element :parent org-add-props nil plist-put] 6] nil apply org-element-set-contents :parent get-text-property 0 plist-get org-add-props plist-put] 7 "\n\n(fn S)"](#("John Kitchin" 0 12 (:parent (#0))))
  #[257 "\211\211:\204��\211;\205��\311\262�\202��\211@9\205��\211@\262��?\206��\301\203-��\312\301\313\">\206��\211\2049�\314\310\242�\"\202��\211\315=\203]�\314\310\242�\211:\204N�\316\262�\202Y�\211@9\203Y�\211AA\262�\"\202��\211\304>\203~�\300�!\211\203}�\302\203v�\317\320�\"\210\202}�\307�\307\242B\240\210\210\306\321=\203\271��;\204\271�\211��\236A\211\203\270�\211@\310\242��\211;\203\247�\322\323��#\266\202\202\257�\312�A@�\"\266\202!\210�A\266\202\202\216�\210\303\203\377�\306\321=\203\377��\316�\211:\204\326�\211;\205\336�\311\262�\202\340�\211@9\205\336�\211@\262��\206\375�\324�\211;\203\365�\322\323��#\266\202\202\375�\312�A@�\"\266\202���>\203��\325\202r����>\203��\326\202r��\315=\203��\326\202r��\311=\203'�\325\202r��\204/�\325\202r�\211\2047�\326\202r�\211\211:\204H�\211;\205P�\311\262�\202R�\211@9\205P�\211@\262�\211\204Z�\325\202p�\211��>\203e�\325\202p�\327�!\203o�\325\202p�\326\262�\266\204\326=\203\377���\211\203\376�\211@\211@�A�\211;\203\225�\322\323��#\266\202\202\235�\312�A@�\"\266\202\211\203\365��� \235\203\336���!\235\203\317�\330�!\211\203\313�\211@\310\242�A!\210\310\242�@!\210�A\266\202\202\262�\210\202\365�\310\242�A!\210\310\242�@!\210\202\365���!\235\203\360�\314\310\242\330�!\"\210\202\365�\310\242�!\210\266��A\266\202\202{�\210\211\305>\206���\211:\204��\316\262�\202��\211@9\203��\211AA\262�?\206��\306\331=\203.�\211�\">?\206��\306\332=\203\352��\316�\211:\204G�\211;\205O�\311\262�\202Q�\211@9\205O�\211@\262��\206n�\324�\211;\203f�\322\323��#\266\202\202n�\312�A@�\"\266\202���>\203y�\325\202\343����>\203\204�\326\202\343��\315=\203\216�\326\202\343��\311=\203\230�\325\202\343��\204\240�\325\202\343�\211\204\250�\326\202\343�\211\211:\204\271�\211;\205\301�\311\262�\202\303�\211@9\205\301�\211@\262�\211\204\313�\325\202\341�\211��>\203\326�\325\202\341�\327�!\203\340�\325\202\341�\326\262�\266\204\325=\206��\314\310\242�\211:\204\371�\316\262�\202��\211@9\203��\211AA\262�\"\207" [#[257 "\211\305\306\307�#��\310\311�\211�:\204��\312\202\"�\n@9\203!�\nAA\202\"�\n)\"\210\313\314	�\211�:\2043�\312\202@�\n@9\203?�\nAA\202@�\n)#\210�\315\211	��\n;\203V�\316\317�\n#\202\\�\320\nA@�\"*��\211�;\203n�\321\n\312�\f$\202z�\nA\322\nA@�\f#\240\210\n+\210	A�A@\240\210	�@\240*\207" [new old element property value replace-regexp-in-string "\n" " " mapc #[(blob) "�\305	��\211�;\203��\306\f\307�\n$\202 �\fA\310\fA@�\n#\240\210\f+\207" [blob old value property element :parent org-add-props nil plist-put] 6] nil apply org-element-set-contents :parent get-text-property 0 plist-get org-add-props plist-put] 7 "\n\n(fn S)"] nil nil nil (plain-text) nil objects (nil) (#0) plain-text plist-get :ignore-list mapc org-data nil throw :--map-first-match objects get-text-property 0 :parent object element org-element-secondary-p reverse greater-elements elements org-element-secondary-value-alist org-element-all-objects org-element-all-elements org-element-object-containers org-element--parsed-properties-alist org-element-dual-keywords org-element-multiple-keywords org-element-greater-elements] 11 "\n\n(fn --DATA)"](#("John Kitchin" 0 12 (:parent (#0))))
  mapc(#[257 "\211\211:\204��\211;\205��\311\262�\202��\211@9\205��\211@\262��?\206��\301\203-��\312\301\313\">\206��\211\2049�\314\310\242�\"\202��\211\315=\203]�\314\310\242�\211:\204N�\316\262�\202Y�\211@9\203Y�\211AA\262�\"\202��\211\304>\203~�\300�!\211\203}�\302\203v�\317\320�\"\210\202}�\307�\307\242B\240\210\210\306\321=\203\271��;\204\271�\211��\236A\211\203\270�\211@\310\242��\211;\203\247�\322\323��#\266\202\202\257�\312�A@�\"\266\202!\210�A\266\202\202\216�\210\303\203\377�\306\321=\203\377��\316�\211:\204\326�\211;\205\336�\311\262�\202\340�\211@9\205\336�\211@\262��\206\375�\324�\211;\203\365�\322\323��#\266\202\202\375�\312�A@�\"\266\202���>\203��\325\202r����>\203��\326\202r��\315=\203��\326\202r��\311=\203'�\325\202r��\204/�\325\202r�\211\2047�\326\202r�\211\211:\204H�\211;\205P�\311\262�\202R�\211@9\205P�\211@\262�\211\204Z�\325\202p�\211��>\203e�\325\202p�\327�!\203o�\325\202p�\326\262�\266\204\326=\203\377���\211\203\376�\211@\211@�A�\211;\203\225�\322\323��#\266\202\202\235�\312�A@�\"\266\202\211\203\365��� \235\203\336���!\235\203\317�\330�!\211\203\313�\211@\310\242�A!\210\310\242�@!\210�A\266\202\202\262�\210\202\365�\310\242�A!\210\310\242�@!\210\202\365���!\235\203\360�\314\310\242\330�!\"\210\202\365�\310\242�!\210\266��A\266\202\202{�\210\211\305>\206���\211:\204��\316\262�\202��\211@9\203��\211AA\262�?\206��\306\331=\203.�\211�\">?\206��\306\332=\203\352��\316�\211:\204G�\211;\205O�\311\262�\202Q�\211@9\205O�\211@\262��\206n�\324�\211;\203f�\322\323��#\266\202\202n�\312�A@�\"\266\202���>\203y�\325\202\343����>\203\204�\326\202\343��\315=\203\216�\326\202\343��\311=\203\230�\325\202\343��\204\240�\325\202\343�\211\204\250�\326\202\343�\211\211:\204\271�\211;\205\301�\311\262�\202\303�\211@9\205\301�\211@\262�\211\204\313�\325\202\341�\211��>\203\326�\325\202\341�\327�!\203\340�\325\202\341�\326\262�\266\204\325=\206��\314\310\242�\211:\204\371�\316\262�\202��\211@9\203��\211AA\262�\"\207" [#[257 "\211\305\306\307�#��\310\311�\211�:\204��\312\202\"�\n@9\203!�\nAA\202\"�\n)\"\210\313\314	�\211�:\2043�\312\202@�\n@9\203?�\nAA\202@�\n)#\210�\315\211	��\n;\203V�\316\317�\n#\202\\�\320\nA@�\"*��\211�;\203n�\321\n\312�\f$\202z�\nA\322\nA@�\f#\240\210\n+\210	A�A@\240\210	�@\240*\207" [new old element property value replace-regexp-in-string "\n" " " mapc #[(blob) "�\305	��\211�;\203��\306\f\307�\n$\202 �\fA\310\fA@�\n#\240\210\f+\207" [blob old value property element :parent org-add-props nil plist-put] 6] nil apply org-element-set-contents :parent get-text-property 0 plist-get org-add-props plist-put] 7 "\n\n(fn S)"] nil nil nil (plain-text) nil objects (nil) (#0) plain-text plist-get :ignore-list mapc org-data nil throw :--map-first-match objects get-text-property 0 :parent object element org-element-secondary-p reverse greater-elements elements org-element-secondary-value-alist org-element-all-objects org-element-all-elements org-element-object-containers org-element--parsed-properties-alist org-element-dual-keywords org-element-multiple-keywords org-element-greater-elements] 11 "\n\n(fn --DATA)"] (#("John Kitchin" 0 12 (:parent #0))))
  #[257 "\211\211:\204��\211;\205��\311\262�\202��\211@9\205��\211@\262��?\206��\301\203-��\312\301\313\">\206��\211\2049�\314\310\242�\"\202��\211\315=\203]�\314\310\242�\211:\204N�\316\262�\202Y�\211@9\203Y�\211AA\262�\"\202��\211\304>\203~�\300�!\211\203}�\302\203v�\317\320�\"\210\202}�\307�\307\242B\240\210\210\306\321=\203\271��;\204\271�\211��\236A\211\203\270�\211@\310\242��\211;\203\247�\322\323��#\266\202\202\257�\312�A@�\"\266\202!\210�A\266\202\202\216�\210\303\203\377�\306\321=\203\377��\316�\211:\204\326�\211;\205\336�\311\262�\202\340�\211@9\205\336�\211@\262��\206\375�\324�\211;\203\365�\322\323��#\266\202\202\375�\312�A@�\"\266\202���>\203��\325\202r����>\203��\326\202r��\315=\203��\326\202r��\311=\203'�\325\202r��\204/�\325\202r�\211\2047�\326\202r�\211\211:\204H�\211;\205P�\311\262�\202R�\211@9\205P�\211@\262�\211\204Z�\325\202p�\211��>\203e�\325\202p�\327�!\203o�\325\202p�\326\262�\266\204\326=\203\377���\211\203\376�\211@\211@�A�\211;\203\225�\322\323��#\266\202\202\235�\312�A@�\"\266\202\211\203\365��� \235\203\336���!\235\203\317�\330�!\211\203\313�\211@\310\242�A!\210\310\242�@!\210�A\266\202\202\262�\210\202\365�\310\242�A!\210\310\242�@!\210\202\365���!\235\203\360�\314\310\242\330�!\"\210\202\365�\310\242�!\210\266��A\266\202\202{�\210\211\305>\206���\211:\204��\316\262�\202��\211@9\203��\211AA\262�?\206��\306\331=\203.�\211�\">?\206��\306\332=\203\352��\316�\211:\204G�\211;\205O�\311\262�\202Q�\211@9\205O�\211@\262��\206n�\324�\211;\203f�\322\323��#\266\202\202n�\312�A@�\"\266\202���>\203y�\325\202\343����>\203\204�\326\202\343��\315=\203\216�\326\202\343��\311=\203\230�\325\202\343��\204\240�\325\202\343�\211\204\250�\326\202\343�\211\211:\204\271�\211;\205\301�\311\262�\202\303�\211@9\205\301�\211@\262�\211\204\313�\325\202\341�\211��>\203\326�\325\202\341�\327�!\203\340�\325\202\341�\326\262�\266\204\325=\206��\314\310\242�\211:\204\371�\316\262�\202��\211@9\203��\211AA\262�\"\207" [#[257 "\211\305\306\307�#��\310\311�\211�:\204��\312\202\"�\n@9\203!�\nAA\202\"�\n)\"\210\313\314	�\211�:\2043�\312\202@�\n@9\203?�\nAA\202@�\n)#\210�\315\211	��\n;\203V�\316\317�\n#\202\\�\320\nA@�\"*��\211�;\203n�\321\n\312�\f$\202z�\nA\322\nA@�\f#\240\210\n+\210	A�A@\240\210	�@\240*\207" [new old element property value replace-regexp-in-string "\n" " " mapc #[(blob) "�\305	��\211�;\203��\306\f\307�\n$\202 �\fA\310\fA@�\n#\240\210\f+\207" [blob old value property element :parent org-add-props nil plist-put] 6] nil apply org-element-set-contents :parent get-text-property 0 plist-get org-add-props plist-put] 7 "\n\n(fn S)"] nil nil nil (plain-text) nil objects (nil) (#0) plain-text plist-get :ignore-list mapc org-data nil throw :--map-first-match objects get-text-property 0 :parent object element org-element-secondary-p reverse greater-elements elements org-element-secondary-value-alist org-element-all-objects org-element-all-elements org-element-object-containers org-element--parsed-properties-alist org-element-dual-keywords org-element-multiple-keywords org-element-greater-elements] 11 "\n\n(fn --DATA)"]((#("John Kitchin" 0 12 (:parent #0))))
  org-element-map((#("John Kitchin" 0 12 (:parent #0))) plain-text #[257 "\211\305\306\307�#��\310\311�\211�:\204��\312\202\"�\n@9\203!�\nAA\202\"�\n)\"\210\313\314	�\211�:\2043�\312\202@�\n@9\203?�\nAA\202@�\n)#\210�\315\211	��\n;\203V�\316\317�\n#\202\\�\320\nA@�\"*��\211�;\203n�\321\n\312�\f$\202z�\nA\322\nA@�\f#\240\210\n+\210	A�A@\240\210	�@\240*\207" [new old element property value replace-regexp-in-string "\n" " " mapc #[(blob) "�\305	��\211�;\203��\306\f\307�\n$\202 �\fA\310\fA@�\n#\240\210\f+\207" [blob old value property element :parent org-add-props nil plist-put] 6] nil apply org-element-set-contents :parent get-text-property 0 plist-get org-add-props plist-put] 7 "\n\n(fn S)"])
  org-export--get-inbuffer-options([cl-struct-org-export-backend org nil ((babel-call . org-org-identity) (bold . org-org-identity) (center-block . org-org-identity) (clock . org-org-identity) (code . org-org-identity) (diary-sexp . org-org-identity) (drawer . org-org-identity) (dynamic-block . org-org-identity) (entity . org-org-identity) (example-block . org-org-identity) (export-block . org-org-export-block) (fixed-width . org-org-identity) (footnote-definition . ignore) (footnote-reference . org-org-identity) (headline . org-org-headline) (horizontal-rule . org-org-identity) (inline-babel-call . org-org-identity) (inline-src-block . org-org-identity) (inlinetask . org-org-identity) (italic . org-org-identity) (item . org-org-identity) (keyword . org-org-keyword) (latex-environment . org-org-identity) (latex-fragment . org-org-identity) (line-break . org-org-identity) (link . org-org-link) (node-property . org-org-identity) (template . org-org-template) (paragraph . org-org-identity) (plain-list . org-org-identity) (planning . org-org-identity) (property-drawer . org-org-identity) (quote-block . org-org-identity) (radio-target . org-org-identity) (section . org-org-section) (special-block . org-org-identity) (src-block . org-org-identity) (statistics-cookie . org-org-identity) (strike-through . org-org-identity) (subscript . org-org-identity) (superscript . org-org-identity) (table . org-org-identity) (table-cell . org-org-identity) (table-row . org-org-identity) (target . org-org-identity) (timestamp . org-org-identity) (underline . org-org-identity) (verbatim . org-org-identity) (verse-block . org-org-identity)) nil ((:filter-parse-tree . org-org--add-missing-sections)) nil (79 "Export to Org" ((79 "As Org buffer" org-org-export-as-org) (111 "As Org file" org-org-export-to-org) (118 "As Org file and open" (lambda (a s v b) (if a (org-org-export-to-org t s v b) (org-open-file (org-org-export-to-org nil s v b)))))))])
  org-export-get-environment([cl-struct-org-export-backend org nil ((babel-call . org-org-identity) (bold . org-org-identity) (center-block . org-org-identity) (clock . org-org-identity) (code . org-org-identity) (diary-sexp . org-org-identity) (drawer . org-org-identity) (dynamic-block . org-org-identity) (entity . org-org-identity) (example-block . org-org-identity) (export-block . org-org-export-block) (fixed-width . org-org-identity) (footnote-definition . ignore) (footnote-reference . org-org-identity) (headline . org-org-headline) (horizontal-rule . org-org-identity) (inline-babel-call . org-org-identity) (inline-src-block . org-org-identity) (inlinetask . org-org-identity) (italic . org-org-identity) (item . org-org-identity) (keyword . org-org-keyword) (latex-environment . org-org-identity) (latex-fragment . org-org-identity) (line-break . org-org-identity) (link . org-org-link) (node-property . org-org-identity) (template . org-org-template) (paragraph . org-org-identity) (plain-list . org-org-identity) (planning . org-org-identity) (property-drawer . org-org-identity) (quote-block . org-org-identity) (radio-target . org-org-identity) (section . org-org-section) (special-block . org-org-identity) (src-block . org-org-identity) (statistics-cookie . org-org-identity) (strike-through . org-org-identity) (subscript . org-org-identity) (superscript . org-org-identity) (table . org-org-identity) (table-cell . org-org-identity) (table-row . org-org-identity) (target . org-org-identity) (timestamp . org-org-identity) (underline . org-org-identity) (verbatim . org-org-identity) (verse-block . org-org-identity)) nil ((:filter-parse-tree . org-org--add-missing-sections)) nil (79 "Export to Org" ((79 "As Org buffer" org-org-export-as-org) (111 "As Org file" org-org-export-to-org) (118 "As Org file and open" (lambda (a s v b) (if a (org-org-export-to-org t s v b) (org-open-file (org-org-export-to-org nil s v b)))))))] nil nil)
  org-export-as(org nil nil nil nil)
  org-export-to-buffer(org "*Org ORG Export*" nil nil nil nil nil (closure ((ext-plist) (body-only) (visible-only) (subtreep) (async) htmlize-output-type t) nil (org-mode)))
  org-org-export-as-org(nil nil nil nil nil)
  (let ((ipynb (or (if (boundp (quote export-file-name)) (progn export-file-name)) (concat (file-name-base (buffer-file-name)) ".ipynb"))) buf) (org-org-export-as-org async subtreep visible-only body-only info) (save-current-buffer (set-buffer "*Org ORG Export*") (set (make-local-variable (quote export-file-name)) ipynb) (setq buf (ox-ipynb-export-to-buffer)) (save-current-buffer (set-buffer buf) (set (make-local-variable (quote export-file-name)) ipynb)) (prog1 buf (kill-buffer "*Org ORG Export*"))))
  ox-ipynb-export-to-ipynb-buffer(nil nil nil nil)
  org-export-dispatch(nil)
  funcall-interactively(org-export-dispatch nil)
  call-interactively(org-export-dispatch nil nil)
  command-execute(org-export-dispatch)

Using org-plus-contrib-20171004 with Emacs 25.2.2 on Debian Linux.

I would appreciate any idea how to resolve this.

[andreas-h]

PS: The same is true when I initialize with

(add-to-list 'load-path "~/.emacs.d/external/ox-ipynb/")
(require 'ox-ipynb)

instead.

[andreas-h]

Never mind, that was a problem with my org install (mixed versions builtin org and org-plus-contrib from org elpa, because I accidentally had a call to some org function in my init file before package-initialize).