Failed to create task or type propertyfile: Ant build

Hi I am facing this problem while building a source using ant

Problem: failed to create task or type propertyfile
Cause: the class org.apache.tools.ant.taskdefs.optional.PropertyFile was not found.
This looks like one of Ant's optional components.
Action: Check that the appropriate optional JAR exists in
-/usr/share/ant/lib

I am not able to figure out which additional component of ant is missing i did yum install the latest ant package.

Could some one help

Thanks