"taskdef class "ignore"/> cannot be found"

Are you struggling with this annoying error while configuring your ant script.

You know that the following code is causing the issue

<taskdef resource="net/sf/antcontrib/antlib.xml" >
<classpath>
<pathelement location="C:\Users\Token\Desktop\ant\lib" />
</classpath>
</taskdef>

but you are not able to resolve it.

Try to redefine this code in a different way

<path id="ant-contrib.classpath">
<pathelement location="C:\Users\Token\Desktop\ant\lib\ant-contrib-1.0b3.jar"/>
</path>

<taskdef resource="net/sf/antcontrib/antlib.xml"
classpathref="ant-contrib.classpath"/>

This has worked for me