problem implementing wicked pdf on heroku

Question

I am using this guide for integrating wicked_pdf on heroku. But somehow it doesn't seem to work. I got the logs from heroku and its says this:

Processing PdfController#get_pdf to pdf (for 115.248.175.50 at 2011-02-15 23:54:44) [GET]
  Parameters: {"format"=>"pdf", "action"=>"get_pdf", "id"=>"1", "controller"=>"pdf"}
***************WICKED***************
Rendering pdf/get_pdf

RuntimeError (PDF could not be generated!
/usr/ruby1.8.7/lib/ruby/1.8/open3.rb:73:in `exec': No such file or directory - /app/fa369291-829b-4b61-9efe-b2f0d0a0a42c/home/bin/wkhtmltopdf-amd64       - -  (Errno::ENOENT)
    from /usr/ruby1.8.7/lib/ruby/1.8/open3.rb:73:in `popen3'
    from /usr/ruby1.8.7/lib/ruby/1.8/open3.rb:59:in `fork'
    from /usr/ruby1.8.7/lib/ruby/1.8/open3.rb:59:in `popen3'
    from /usr/ruby1.8.7/lib/ruby/1.8/open3.rb:57:in `fork'
    from /usr/ruby1.8.7/lib/ruby/1.8/open3.rb:57:in `popen3'
    from /app/fa369291-829b-4b61-9efe-b2f0d0a0a42c/home/vendor/plugins/wicked_pdf/lib/wicked_pdf.rb:22:in `pdf_from_string'
    from /app/fa369291-829b-4b61-9efe-b2f0d0a0a42c/home/vendor/plugins/wicked_pdf/lib/pdf_helper.rb:28:in `make_pdf'
    from /app/fa369291-829b-4b61-9efe-b2f0d0a0a42c/home/vendor/plugins/wicked_pdf/lib/pdf_helper.rb:39:in `make_and_send_pdf'
    from /app/fa369291-829b-4b61-9efe-b2f0d0a0a42c/home/vendor/plugins/wicked_pdf/lib/pdf_helper.rb:13:in `render'
    from /app/fa369291-829b-4b61-9efe-b2f0d0a0a42c/home/app/controllers/schedule_controller.rb:33:in `get_pdf'

Please Help. Thanks in Advance.

EDIT:

I made some changes in my code and got through this error but still stuck here

NoMethodError (undefined method empty? for #<Pathname:0x2b7112392480>)

Answer 1

After looking at your Edit part which says "undefined method empty? for #<Pathname:0x2b...>

This means you are somewhere using empty? function on a path Object whereas empty? is a function of a string and not path.

try to find out where you have used a path Object and use to_s on that object.

Try it out.