Ant-Contrib for loop error

When trying to use Ant-Contrib for loops today, I ran into the error below:

C:\Projects\…\ant\build.xml:200: Problem: failed to create task or type for
Cause: The name is undefined.
Action: Check the spelling.
Action: Check that any custom tasks/types have been declared.
Action: Check that any <presetdef>/<macrodef> declarations have taken place.

To fix the error I had to update the Ant-Contrib taskdef resource path from using “” to use “antlib.xml” in my Ant build file.

  1. // Remove this line
  2. <taskdef resource="net/sf/antcontrib/>
  3. // And replace with this one
  4. <taskdef resource="net/sf/antcontrib/antlib.xml">

According to the Ant-Contrib manual (found in [Ant-Contrib install dir]/docs/manual/index.html) you need to use the “” file when you want Ant-Contrib to run with Ant Version 1.5. They even place a warning saying:

Keep in mind that some tasks will not be available to you , such as the <for> task

The confusing part is that on the project page they tell you to use the “” file.

Installing ANT contrib for Eclipse

A quick step by step guide to installing ANT-contrib for Eclipse (on Windows).

  1. Download ANT-contrib:
  2. Extract the zip to your harddrive, I extracted it to C:/ant-contrib/
  3. Include ANT-contrib in your ANT build file, so you don’t have to set it up every time you create a new project. (See XML below)
  4. All done!

Additional XML in ANT build script:

  1. &lt;taskdef resource="net/sf/antcontrib/"&gt;
  2. &lt;classpath&gt;
  3. &lt;pathelement location="[full path to ant-contrib jar]"/&gt;
  4. &lt;/classpath&gt;
  5. &lt;/taskdef&gt;