Paperclip can't find imagemagick

Question

Okay, I have imagemagick installed on my local machine via homebrew, and Gemfile.lock shows paperclip locked at version paperclip (3.0.4).

Per the setup instructions, I set the following command in development.rb

Paperclip.options[:command_path] = "/usr/local/bin/"

Which lines up with what the terminal says

$ which identify
  # => /usr/local/bin/identify

However, when I try to upload an image, the following error spits out on my form

/var/folders/dm/lnshrsls2zz6l4r_tkbk7j2w0000gn/T/avatar20120522-44111-gfis2q.jpg is not recognized by the 'identify' command.

Which every SO question I can find on the matter suggests the problem is Paperclip can't find identify in it's command path.

I used the Paperclip generator to add the avatar to my database, and my model has:

has_attached_file :avatar, :styles => { :medium => "300x300>", :thumb => "100x100>" }

Furthermore, if I load up rails c and look at Paperclip.options, I can see the command path has been properly set in the hash.

Not quite sure what to do at this point. Any help would be appreciated.

does the identify command actually run from the command prompt? e.g. $ identify -version — Ivan
It returns dyld: Library not loaded: /usr/local/lib/libtiff.3.dylib Referenced from: /usr/local/bin/identify Reason: image not found Trace/BPT trap: 5 — DVG
Do you know if you have /usr/local/lib included for your ld.so conf? if your running Ubuntu (and probably other Linux dists) you should make sure /usr/local/lib is in some file in /etc/ld.so.conf.d (default the libc seams to include it, if I haven't added it manually, dont remember). Then run ldconfig as root and restart the web server. — Mattias Wadman
Running OS X, as near as I can tell, ld.so.conf isn't a thing over here. — DVG
Ah ok. Does /usr/local/lib/libtiff.3.dylib really exist? have you fiddled with any DYLD_* environment variables? (check man dydl, /usr/local/lib is included in the default fallback search paths). — Mattias Wadman

Ivan Ivan · Accepted Answer · 2012-05-23T18:39:17

I'm glad that running the command got you started on the right path.

The problem was that your ImageMagick was compiled for the wrong architecture:

dyld: Library not loaded: /usr/local/lib/libtiff.3.dylib Referenced from: /usr/local/bin/identify Reason: image not found Trace/BPT trap

Uninstalling imagemagick, updating homebrew and reinstalling it was the right thing to do.