Hi! When I try 'M-x flyspell-mode RETURN', I get the following error: "Error enabling Flyspell mode: (ispell-set-spellchecker-params)" Also, when I try 'M-x flyspell-region', I get "flyspell-region: Symbol's function definition is void: ispell-set-spellchecker-params" Could you please help me getting flyspell mode work. Best regards, Rostyslav. In GNU Emacs 24.5.1 (x86_64-apple-darwin13.4.0, NS apple-appkit-1265.21) of 2015-04-10 on builder10-9.porkrind.org Windowing system distributor `Apple', version 10.3.1347 Configured using: `configure --with-ns '--enable-locallisppath=/Library/Application Support/Emacs/${version}/site-lisp:/Library/Application Support/Emacs/site-lisp'' Important settings: locale-coding-system: utf-8-unix Major mode: Messages Minor modes in effect: shell-dirtrack-mode: t global-column-enforce-mode: t TeX-PDF-mode: t global-auto-complete-mode: t global-linum-mode: t linum-mode: t tooltip-mode: t mouse-wheel-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t buffer-read-only: t column-number-mode: t line-number-mode: t transient-mark-mode: t Recent messages: Error enabling Flyspell mode: (ispell-set-spellchecker-params) Mark set [2 times] Making completion list... flyspell-region: Symbol's function definition is void: ispell-set-spellchecker-params Buffer is read-only: # Making completion list... Library is file /Applications/Emacs.app/Contents/Resources/lisp/textmodes/flyspell.elc flyspell-word: Symbol's function definition is void: ispell-set-spellchecker-params Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug sendmail pp flyspell ispell thingatpt yasnippet preview prv-emacs tex-buf reftex-dcr reftex-auc reftex reftex-vars noutline outline font-latex tex-mode shell pcomplete latexenc dired misearch multi-isearch mule-util mm-archive message format-spec rfc822 mml mml-sec mailabbrev gmm-utils mailheader mm-decode mm-bodies mm-encode mail-utils network-stream starttls url-http tls mail-parse rfc2231 rfc2047 rfc2045 ietf-drums url-gw url-cache url-auth url url-proxy url-privacy url-expand url-methods url-history url-cookie url-domsuf url-util mailcap url-handlers url-parse auth-source eieio byte-opt bytecomp byte-compile cl-extra cconv eieio-core gnus-util mm-util mail-prsvr password-cache url-vars finder-inf flycheck find-func help-mode rx subr-x dash flymake compile comint ansi-color ring column-enforce-mode cl auto-complete-auctex latex easy-mmode tex-style tex crm advice help-fns auto-complete-config ac-math auto-complete edmacro kmacro cl-macs gv popup cl-loaddefs cl-lib math-symbol-lists tex-site info easymenu package epg-config deeper-blue-theme linum cus-start cus-load time-date tooltip electric uniquify ediff-hook vc-hooks lisp-float-type mwheel ns-win tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment lisp-mode prog-mode register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote make-network-process cocoa ns multi-tty emacs) Memory information: ((conses 16 269881 65940) (symbols 48 33488 0) (miscs 40 508 493) (strings 32 80578 24326) (string-bytes 1 1853845) (vectors 16 32248) (vector-slots 8 1348208 166060) (floats 8 155 321) (intervals 56 1401 997) (buffers 960 20))