Debugger entered--Lisp error: (void-function org-file-name-concat)
  org-file-name-concat("/home/oub/.cache" "org-persist/")
  byte-code("\301\302\303 \304\1!\203\16\0\10\202\17\0\211\262\1\305\"!\207" [user-emacs-directory expand-file-name org-file-name-concat xdg-cache-home seq-empty-p "org-persist/"] 5)
  (defvar org-persist-directory (byte-code "\301\302\303 \304\1!\203\16\0\10\202\17\0\211\262\1\305\"!\207" [user-emacs-directory expand-file-name org-file-name-concat xdg-cache-home seq-empty-p "org-persist/"] 5) ("/home/oub/emacs/site-lisp/packages/org/org-persist..." . 175))
  require(org-persist)
  byte-code("\300\301!\210\300\302!\210\300\303!\210\300\304!\210\300\305!\210\300\306!\210\300\307!\210\300\310!\210\300\311!\210\300\312!\210\300\313!\210\300\314!\207" [require avl-tree ring cl-lib ol org org-persist org-compat org-entities org-footnote org-list org-macs org-table] 2)
  require(org-element)
  byte-code("\300\301!\210\300\302!\210\300\303!\210\300\304!\210\300\305!\210\300\306!\210\300\307!\210\300\310!\207" [require cl-lib ob-exp oc oc-basic ol org-element org-macro tabulated-list] 2)
  require(ox)
  byte-code("\300\301!\210\300\302!\210\300\303!\210\300\304!\210\300\305!\210\306\307\310\311\312\313\314\315\316&\10\207" [require cl-lib format-spec ox ox-publish table org-export-define-backend html ((bold . org-html-bold) (center-block . org-html-center-block) (clock . org-html-clock) (code . org-html-code) (drawer . org-html-drawer) (dynamic-block . org-html-dynamic-block) (entity . org-html-entity) (example-block . org-html-example-block) (export-block . org-html-export-block) (export-snippet . org-html-export-snippet) (fixed-width . org-html-fixed-width) (footnote-reference . org-html-footnote-reference) (headline . org-html-headline) (horizontal-rule . org-html-horizontal-rule) (inline-src-block . org-html-inline-src-block) (inlinetask . org-html-inlinetask) (inner-template . org-html-inner-template) (italic . org-html-italic) (item . org-html-item) (keyword . org-html-keyword) (latex-environment . org-html-latex-environment) (latex-fragment . org-html-latex-fragment) (line-break . org-html-line-break) (link . org-html-link) (node-property . org-html-node-property) (paragraph . org-html-paragraph) (plain-list . org-html-plain-list) (plain-text . org-html-plain-text) (planning . org-html-planning) (property-drawer . org-html-property-drawer) (quote-block . org-html-quote-block) (radio-target . org-html-radio-target) (section . org-html-section) (special-block . org-html-special-block) (src-block . org-html-src-block) (statistics-cookie . org-html-statistics-cookie) (strike-through . org-html-strike-through) (subscript . org-html-subscript) (superscript . org-html-superscript) (table . org-html-table) (table-cell . org-html-table-cell) (table-row . org-html-table-row) (target . org-html-target) (template . org-html-template) ...) :filters-alist ((:filter-options . org-html-infojs-install-script) (:filter-parse-tree . org-html-image-link-filter) (:filter-final-output . org-html-final-function)) :menu-entry (104 "Export to HTML" ((72 "As HTML buffer" org-html-export-as-html) (104 "As HTML file" org-html-export-to-html) (111 "As HTML file and open" (lambda (a s v b) (if a ... ...))))) :options-alist ((:html-doctype "HTML_DOCTYPE" nil org-html-doctype) (:html-container "HTML_CONTAINER" nil org-html-container-element) (:html-content-class "HTML_CONTENT_CLASS" nil org-html-content-class) (:description "DESCRIPTION" nil nil newline) (:keywords "KEYWORDS" nil nil space) (:html-html5-fancy nil "html5-fancy" org-html-html5-fancy) (:html-link-use-abs-url nil "html-link-use-abs-url" org-html-link-use-abs-url) (:html-link-home "HTML_LINK_HOME" nil org-html-link-home) (:html-link-up "HTML_LINK_UP" nil org-html-link-up) (:html-mathjax "HTML_MATHJAX" nil "" space) (:html-equation-reference-format "HTML_EQUATION_REFERENCE_FORMAT" nil org-html-equation-reference-format t) (:html-postamble nil "html-postamble" org-html-postamble) (:html-preamble nil "html-preamble" org-html-preamble) (:html-head "HTML_HEAD" nil org-html-head newline) (:html-head-extra "HTML_HEAD_EXTRA" nil org-html-head-extra newline) (:subtitle "SUBTITLE" nil nil parse) (:html-head-include-default-style nil "html-style" org-html-head-include-default-style) (:html-head-include-scripts nil "html-scripts" org-html-head-include-scripts) (:html-allow-name-attribute-in-anchors nil nil org-html-allow-name-attribute-in-anchors) (:html-divs nil nil org-html-divs) (:html-checkbox-type nil nil org-html-checkbox-type) (:html-extension nil nil org-html-extension) (:html-footnote-format nil nil org-html-footnote-format) (:html-footnote-separator nil nil org-html-footnote-separator) (:html-footnotes-section nil nil org-html-footnotes-section) (:html-format-drawer-function nil nil org-html-format-drawer-function) (:html-format-headline-function nil nil org-html-format-headline-function) (:html-format-inlinetask-function nil nil org-html-format-inlinetask-function) (:html-home/up-format nil nil org-html-home/up-format) (:html-indent nil nil org-html-indent) (:html-infojs-options nil nil org-html-infojs-options) (:html-infojs-template nil nil org-html-infojs-template) (:html-inline-image-rules nil nil org-html-inline-image-rules) (:html-link-org-files-as-html nil nil org-html-link-org-files-as-html) (:html-mathjax-options nil nil org-html-mathjax-options) (:html-mathjax-template nil nil org-html-mathjax-template) (:html-metadata-timestamp-format nil nil org-html-metadata-timestamp-format) (:html-postamble-format nil nil org-html-postamble-format) (:html-preamble-format nil nil org-html-preamble-format) (:html-prefer-user-labels nil nil org-html-prefer-user-labels) (:html-self-link-headlines nil nil org-html-self-link-headlines) (:html-table-align-individual-fields nil nil org-html-table-align-individual-fields) (:html-table-caption-above nil nil org-html-table-caption-above) (:html-table-data-tags nil nil org-html-table-data-tags) ...)] 9)
  require(ox-html)
  byte-code("\300\301!\210\300\302!\210\300\303!\210\304\305\306\307\310\311\312\313\314\315\316\317&\13\210\320\321\322\323\324DD\325\312\305\326\327&\7\210\320\330\322\323\331DD\332..." [require cl-lib ox-html ox-publish custom-declare-group org-export-md nil "Options specific to Markdown export back-end." :tag "Org Markdown" :group org-export :version "24.4" :package-version (Org . "8.0") custom-declare-variable org-md-headline-style funcall function #f(compiled-function () #<bytecode 0x1f400b723399>) "Style used to format headlines.\nThis variable can ..." :type (choice (const :tag "Use \"atx\" style" atx) (const :tag "Use \"Setext\" style" setext)) org-md-footnotes-section #f(compiled-function () #<bytecode 0x1f40006223633>) "Format string for the footnotes section.\nThe first..." string "26.1" (Org . "9.0") org-md-footnote-format #f(compiled-function () #<bytecode -0x377aad65da8591f>) "Format string for the footnote reference.\nThe %s w..." (Org . "9.0") org-export-define-derived-backend md html :filters-alist ((:filter-parse-tree . org-md-separate-elements)) :menu-entry (109 "Export to Markdown" ((77 "To temporary buffer" (lambda (a s v b) (org-md-export-as-markdown a s v))) (109 "To file" (lambda (a s v b) (org-md-export-to-markdown a s v))) (111 "To file and open" (lambda (a s v b) (if a (org-md-export-to-markdown t s v) (org-open-file ...)))))) :translate-alist ((bold . org-md-bold) (center-block . org-md--convert-to-html) (code . org-md-verbatim) (drawer . org-md--identity) (dynamic-block . org-md--identity) (example-block . org-md-example-block) (export-block . org-md-export-block) (fixed-width . org-md-example-block) (headline . org-md-headline) (horizontal-rule . org-md-horizontal-rule) (inline-src-block . org-md-verbatim) (inlinetask . org-md--convert-to-html) (inner-template . org-md-inner-template) (italic . org-md-italic) (item . org-md-item) (keyword . org-md-keyword) (latex-environment . org-md-latex-environment) (latex-fragment . org-md-latex-fragment) (line-break . org-md-line-break) (link . org-md-link) (node-property . org-md-node-property) (paragraph . org-md-paragraph) (plain-list . org-md-plain-list) (plain-text . org-md-plain-text) (property-drawer . org-md-property-drawer) (quote-block . org-md-quote-block) (section . org-md-section) (special-block . org-md--convert-to-html) (src-block . org-md-example-block) (table . org-md--convert-to-html) (template . org-md-template) (verbatim . org-md-verbatim)) :options-alist ((:md-footnote-format nil nil org-md-footnote-format) (:md-footnotes-section nil nil org-md-footnotes-section) (:md-headline-style nil nil org-md-headline-style))] 12)
  require(ox-md)
  byte-code("\300\301!\210\302\303\304\305\306\307\310\311\312\313\314\315&\13\210\316\317\320\321\310\303\322\323&\7\210\316\324\325\326\310\303\322\327&\7\210\316\330\331\332\310\303\322\327&..." [require ox-md custom-declare-group org-export-pandoc nil "Options specific to Pandoc export back-end." :tag "Org Pandoc" :group org-export :version "24.4" :package-version (Org . "8.0") custom-declare-variable org-pandoc-process-after-export t "Run pandoc to process the file after exporting it?" :type (choice (const :tag "Yes" t) (const :tag "No" nil)) org-pandoc-command "pandoc" "Command to run pandoc." string org-pandoc-extra-options "" "Extra pandoc options to use every time.\nFor exampl..." org-pandoc-output-format 'epub "Default output format for pandoc conversion." symbol org-pandoc-output-standalone "Should output be a single standalone file or not?" boolean org-pandoc-epub-rights "Copyright/license statement to include in EPUB met..." org-pandoc-epub-stylesheet "Stylesheet to apply to EPUB files."] 12)
  require(ox-pandoc)
  eval-buffer(#<buffer  *load*-315843> nil "/home/oub/emacs/init/emacs_init.el" nil t)  ; Reading at buffer position 22629
  load-with-code-conversion("/home/oub/emacs/init/emacs_init.el" "/home/oub/emacs/init/emacs_init.el" nil nil)
  load("/home/oub/emacs/init/emacs_init.el" nil nil t)
  load-file("~/emacs/init/emacs_init.el")
  (cond ((and (not running-xemacs) (> emacs-major-version 19)) (package-initialize) (load-file "~/emacs/init/emacs_init.el") (setq custom-file "/home/oub/emacs/init/custom-init.el") (load-file "/home/oub/emacs/init/custom-init.el")))
  eval-buffer(#<buffer  *load*> nil "/home/oub/.emacs" nil t)  ; Reading at buffer position 905
  load-with-code-conversion("/home/oub/.emacs" "/home/oub/.emacs" nil nil)
  load("/home/oub/.emacs" nil nil t)
  load-file("~/.emacs")
  funcall-interactively(load-file "~/.emacs")
  call-interactively(load-file nil nil)
  command-execute(load-file)