Nothing I have tried seems to have any impact at all on this error. The code is working on both a Mac Pro dev maching as well as our Ubunto 9.10 server. Dev work is using Mongrel not Passenger.
I am fully and completely stumped. Willing to try anything.
I followed this: http://thewebfellas.com/blog/2008/11/2/goodbye-attachment_fu-hello-paperclip to the letter.
I tried installing both 32 and 64 bit versions (on XP 64).
Updated config with:
require "paperclip" Paperclip.options[:command_path] = 'C:\ImageMagick\ImageMagick-6.6.3-Q16' Paperclip.options[:swallow_stderr] = false
System is: XP 64 bit service pack 2 Rails 2.3.8 paperclip 2.3.3 aws-s3 0.6.2
There is some goofy stuff going on in the paperclip.rb file. It adds single quotes around command line arguments. If I can recall, I believe its on line 133 and the line looks like this:
... '#{m}' ...
Just remove the single quotes.
If that doesn't help there was also an issue with there being spaces in the ImageMagick path. It didn't like C:\Program Files..., so I had to change it to C:\Progra~1...
That seemed to do the trick for me. That will at least get the identify executable running. I am currently having issues with running convert and am completely confused. :)
There is an issue with the last couple of releases of paperclip when running on Windows. I rollback to a version where it worked but there is a fix that someone has since mentioned. See my comment here + the other fix below:
http://github.com/thoughtbot/paperclip/issues/issue/220/#comment_333169
One thing I just found out as well on windows this command "150x150>" makes problems if you go for Brandon's version as '>' is used for piping on windows boxes. Maybe use something like "150x150#" instead.
来源：https://stackoverflow.com/questions/3420790/completely-stumped-by-is-not-recognized-by-the-identify-command-error-in-rai