Neither ruby and nor irb can load .rb file in current directory

Question

I'm having a really noob problem with importing files in Ruby. I'm making a Ruby app in Windows XP. All the class files for the app are in "C:/Documents/Prgm/Surveyor_Ruby/lib". But when I require a file in another file, neither ruby nor irb can find the required file.

The current directory's contents:

C:\Documents\Prgm\Surveyor_Ruby\lib>dir
 Volume in drive C has no label.
 Volume Serial Number is AAAA-BBBB

 Directory of C:\Documents\Prgm\Surveyor_Ruby\lib

10/09/2010  06:32 PM    <DIR>          .
10/09/2010  06:32 PM    <DIR>          ..
10/08/2010  03:22 PM             5,462 main (commented).rb
10/08/2010  03:41 PM                92 question.rb
10/08/2010  09:06 PM             2,809 survey.rb
10/09/2010  06:25 PM               661 surveyor.rb
10/08/2010  01:39 PM             1,546 test.rb
               5 File(s)         10,570 bytes
               2 Dir(s)  40,255,045,632 bytes free

Confirmation that irb is in correct directory:

C:\Documents\Prgm\Surveyor_Ruby\lib>irb
irb(main):001:0> Dir.pwd
=> "C:/Documents/Prgm/Surveyor_Ruby/lib"

...yet irb can't load survey.rb:

irb(main):002:0> require 'survey'
LoadError: no such file to load -- survey
        from <internal:lib/rubygems/custom_require>:29:in `require'
        from <internal:lib/rubygems/custom_require>:29:in `require'
        from (irb):2
        from C:/Ruby192/bin/irb:12:in `<main>'

Thanks for any suggestions!

Answer 1

Since Ruby 1.9.2 you must use require_relative instead od require.

Answer 2

I believe both of the previous posts are correct, just for different uses. In IRB use an absolute path with require, with a file you can also use require with an absolute path, or use require_relative.

Answer 3

Noticed the same behavior but my linux roots had me try:.\file.rb and it loaded into the irb. Try explicitly declaring the current directory.