Am going through this Helm tutorial at the moment; I pasted in the code verbatim (for now, I'll adapt it to suit my preferences later).
I did a quick google search for this particular error but it doesn't seem common.
For context, prior to adding the elisp code from the tutorial, I was indeed able to use the helm mini-buffer (i.e., helm is indeed installed correctly; i did it through MELPA).
Am including below the full error message that I see after running emacs --debug-init - please see top two lines. (The initialization looks a bit funky in the lines further down because I have Emacs load from the init.el file in my Dropbox.)
Debugger entered--Lisp error: (void-variable helm-map) (define-key helm-map (kbd "C-i") (quote helm-execute-persistent-action)) eval-buffer(#<buffer *load*-462666> nil "/home/dchaudh/Dropbox/dchaudhUbuntu/emacs/.emacs.d/init.el" nil t) ; Reading at buffer position 3629 load-with-code-conversion("/home/dchaudh/Dropbox/dchaudhUbuntu/emacs/.emacs.d/init.el" "/home/dchaudh/Dropbox/dchaudhUbuntu/emacs/.emacs.d/init.el" nil nil) load("~/Dropbox/dchaudhUbuntu/emacs/.emacs.d/init.el") eval-buffer(#<buffer *load*> nil "/home/dchaudh/.emacs" nil t) ; Reading at buffer position 220 load-with-code-conversion("/home/dchaudh/.emacs" "/home/dchaudh/.emacs" t t) load("~/.emacs" t t) #[0 "\205\262 \306=\203\307\310Q\202; \311=\204\307\312Q\202;\313\307\314\315#\203*\316\202;\313\307\314\317#\203:\320\nB\321\202;\316\322\323\322\211#\210\322=\203a\324\325\326\307\327Q!\"\323\322\211#\210\322=\203`\210\203\243\330!\331\232\203\243\332!\211\333P\334!\203}\211\202\210\334!\203\207\202\210\314\262\203\241\335\"\203\237\336\337#\210\340\341!\210\266\f?\205\260\314\323\342\322\211#)\262\207" [init-file-user system-type delayed-warnings-list user-init-file inhibit-default-init inhibit-startup-screen ms-dos "~" "/_emacs" windows-nt "/.emacs" directory-files nil "^\\.emacs\\(\\.elc?\\)?$" "~/.emacs" "^_emacs\\(\\.elc?\\)?$" (initialization "`_emacs' init file is deprecated, please use `.emacs'") "~/_emacs" t load expand-file-name "init" file-name-as-directory "/.emacs.d" file-name-extension "elc" file-name-sans-extension ".el" file-exists-p file-newer-than-file-p message "Warning: %s is newer than %s" sit-for 1 "default"] 7 "\n\n(fn)"]() command-line() normal-top-level()
~/.emacs.d/init.eland just this file? And move your~/.emacselsewhere. It seems like your~/.emacsis loading the otherinit.elinside your Dropbox directory. Your problem is that Helm is not yet loaded. Properly you run the Helm code prior to(package-initialized)? The same code is inside module helm-everywhere in Emacs Prelude, and it works fine.~/.emacsloads theinit.elin my dropbox - it's intentional.)