Imagemagick - "Core_Rl_Magick_.Dll Not Found" or How to Install Rmagick on Windows With Ruby 1.9.2

ImageMagick - CORE_RL_magick_.dll not found or how to install RMagick on windows with ruby 1.9.2

I've finally managed to install ImageMagick and build the RMagick gem and make it all work. Hooray.

It seems like the problem was in the DLL itself. When I tried to registed it, windows gave me a nice error about a problem with the dll.

So my way of solving all the issues is:

1. Go here

2. Download ImageMagick 6.6.1-10 32bit dynamic or any other version except the currently latest release 6.6.9, which has some DLL issues

3. Install it with options: Add to PATH and development headers. Installation path should not contain spaces.
   After the installation it should give you a message box about succesful dll registration.

4. In the command line type convert -version to check if everything works. It should print something like:

   Version: ImageMagick 6.6.1-10 2010-05-15 Q16 http://www.imagemagick.org
   Copyright: Copyright (C) 1999-2010 ImageMagick Studio LLC
   Features: OpenMP

5. Install the DevKit if you haven't already.

6. Install the rmagick gem: gem install rmagick --platform=ruby -- --with-opt-lib=c:/ruby192/ImageMagick/lib --with-opt-include=c:/ruby192/ImageMagick/include

It should print

Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...

And after a few minutes if everything goes right, you should see

Successfully installed rmagick-2.13.1
1 gem installed
Installing ri documentation for rmagick-2.13.1...
Installing RDoc documentation for rmagick-2.13.1...

And that's it. Hope this saves somebody from wasting several hours in frustration.

Just two more links that were helpful: 1 and 2 if you still can't install

Ruby on Rails RMagick on Windows 7

First and most important, when reporting issues or asking for help, always include version information about what you're trying to install, specially Ruby.

It seems you're installing using RailsInstaller, but since you didn't mention if is the 2.0 preview version or the stable one, I'll assume you used the stable one, which is based on Ruby 1.8.7-p334.

Now, RailsInstaller already includes the needed pieces: Ruby and RubyInstaller DevKit component, so going to skip the steps about installation of that and jump directly to RMagick itself.

To successfully install RMagick gem, you need ImageMagick binaries with development headers, as documented in RubyInstaller's Tutorial wiki page, which links here

Please download 32bits version of ImageMagick, as Ruby is 32bits.

For my test I've downloaded the installer version ImageMagick-6.7.0-8-Q16-windows-dll.exe

Once downloaded and installed in a path without spaces and I've selected the option Install development headers and libraries for C and C++.

Then open a new Command Prompt, ensure Ruby is available (checking with ruby -v) and after performed the following command:

gem install rmagick --platform=ruby -- --with-opt-lib=C:\ImageMagick-6.7.0-Q16\lib --with-opt-include=C:\ImageMagick-6.7.0-Q16\include

That command is going to take considerable amount of time (took 1 minute on my Core 2 Duo) but the end result was:

Fetching: rmagick-2.13.1.gem (100%)
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
Successfully installed rmagick-2.13.1
1 gem installed

Now you can verify RMagick installed successfully using IRB:

irb(main):001:0> require "rubygems"
=> true
irb(main):002:0> require "rmagick"
=> true
irb(main):003:0> Magick::Version
=> "RMagick 2.13.1"

Now, if you're using Ruby 1.9.2, last RMagick release is not compatible with it and you will need to build from source. There is another tutorial on RubyInstaller wiki that covers that, but please read this thread at RubyInstaller group were we discuss the issues.

Hope all this helps.

how do you get rmagick to work on windows 7 64-bit with rails 3.1 and carrierwave?

Answer in this thread made it work on both of my computer: RMagick on Windows

I hope it'll work for you too !

Rmagick 2.16.0 not building under Windows with MINGW64

rmagick relies on imagemagick below version 7.
Redmine has a pretty good guide on installing it for windows that should help your lib issues.
http://www.redmine.org/projects/redmine/wiki/HowTo_install_rmagick_gem_on_Windows

rmagick not building on windows 7 undefined reference errors

After doing everything in those posts I did the one thing that none of them mentioned. I went and installed the 32bit version of ImageMagick instead of the 64bit. After doing that I used the same command and it installed. I hope that this helps.

RMagick loses the first 8 characters of the file path I am trying to open

My colleague found the solution -

It was to re-install the rmagick gem.

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