# Autotest problem, can you possibly help me?

**URL:** <https://www.ruby-forum.com/t/autotest-problem-can-you-possibly-help-me/121315>\
**Category:** Rails\
**Created:** [November 26, 2007, 8:22pm UTC](https://www.ruby-forum.com/t/autotest-problem-can-you-possibly-help-me/121315 "2007-11-26T20:22:09Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Piotr\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/e9c0ed/32.png) [@Piotr\_N](https://www.ruby-forum.com/u/Piotr_N)\
**Post date:** [November 26, 2007, 8:22pm UTC](https://www.ruby-forum.com/t/autotest-problem-can-you-possibly-help-me/121315/1 "2007-11-26T20:22:09Z")

</div>

Hi,

Im running windows xp and configured autotest with:  
[http://railsforum.com/viewtopic.php?pid=4796](http://railsforum.com/viewtopic.php?pid=4796)

when i do

autotest --rails

i get following error:

D:/servers/InstantRails/ruby/lib/ruby/gems/1.8/gems/ZenTest-3.6.1/lib/unit\_diff.  
rb:187:in ``‘: No such file or directory - diff.exe -u  
C:/DOCUME~1/Piotrek/USTAW  
I~1/Temp/expect.5412.0 C:/DOCUME~1/Piotrek/USTAWI~1/Temp/butwas.5412.0  
(Errno::E  
NOENT)  
from  
D:/servers/InstantRails/ruby/lib/ruby/gems/1.8/gems/ZenTest-3.6.1/l  
ib/unit\_diff.rb:187:in `unit_diff' from D:/servers/InstantRails/ruby/lib/ruby/1.8/tempfile.rb:172:in `open’

```
     from

```

D:/servers/InstantRails/ruby/lib/ruby/gems/1.8/gems/ZenTest-3.6.1/l  
ib/unit\_diff.rb:180:in `unit_diff' from D:/servers/InstantRails/ruby/lib/ruby/1.8/tempfile.rb:172:in `open’

```
     from

```

D:/servers/InstantRails/ruby/lib/ruby/gems/1.8/gems/ZenTest-3.6.1/l  
ib/unit\_diff.rb:177:in `unit_diff' from D:/servers/InstantRails/ruby/lib/ruby/gems/1.8/gems/ZenTest-3.6.1/l ib/unit_diff.rb:163:in `each’  
from  
D:/servers/InstantRails/ruby/lib/ruby/gems/1.8/gems/ZenTest-3.6.1/l  
ib/unit\_diff.rb:163:in `unit_diff' from D:/servers/InstantRails/ruby/lib/ruby/gems/1.8/gems/ZenTest-3.6.1/l ib/unit_diff.rb:56:in `unit\_diff’  
from  
D:/servers/InstantRails/ruby/lib/ruby/gems/1.8/gems/ZenTest-3.6.1/b  
in/unit\_diff:38  
from D:/servers/InstantRails/ruby/bin/unit\_diff:19:in `load’  
from D:/servers/InstantRails/ruby/bin/unit\_diff:19

wtf ?  
do i need diff.exe ? the instllation guide didnt mention anything on  
that…

---

<div class="post-metadata">

**Author:** ![Piotr\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/e9c0ed/32.png) [@Piotr\_N](https://www.ruby-forum.com/u/Piotr_N)\
**Post date:** [November 26, 2007, 8:35pm UTC](https://www.ruby-forum.com/t/autotest-problem-can-you-possibly-help-me/121315/2 "2007-11-26T20:35:40Z")

</div>

ok solved,

you have to:

install diff.exe from

> **[GnuWin32 Packages](https://gnuwin32.sourceforge.net/packages.html)**
>
> GnuWin32 Packages

add it to your PATH enviroment variables

you’re ready to go 🙂

greets