Build Request failed for Rational Build Agent - antlib:org.apache.tools.ant] Could not load definitions from resource org/apache/tools/ant/antlib.xml

Hi,

  I am getting the following error in build request.

RTC build engine/ Build Agent resides in System z ( RTCz) uses build engine - Rational Build Agent, Ant Enterprise Extension build. 

When I checked from system, the required jar file(com.ibm.teamz.build.ant_3.1.200.v20121012_0257.jar) was available in the location

/rtc4/usr/lpp/jazz/v4.0.1/buildsystem/buildtoolkit.

Apache Ant version 1.7.1 compiled on June 27 2008

* Buildfile: /rtc4/rtcwork/buildload/rtczBuild.xml

* Detected Java version: 1.6 in: /u/Java6_64/J6.0_64

* Detected OS: z/OS

* parsing buildfile /rtc4/rtcwork/buildload/rtczBuild.xml with URI = file:/rtc4/rtcwork/buildload/rtczBuild.xml

* Project base dir set to: /rtc4/rtcwork/buildload

* [antlib:org.apache.tools.ant] Could not load definitions from resource org/apache/tools/ant/antlib.xml. It could not be found.

*  [property] Loading Environment env.

* parsing buildfile jar:file:/rtc4/usr/lpp/jazz/v4.0.1/buildsystem/buildtoolkit/com.ibm.teamz.build.ant_3.1.200.v20121012_0257.jar!/com/ibm/teamz/build/ant/antlib.xml with URI = jar:file:/rtc4/usr/lpp/jazz/v4.0.1/buildsystem/buildtoolkit/com.ibm.teamz.build.ant_3.1.200.v20121012_0257.jar!/com/ibm/teamz/build/ant/antlib.xml

* Build sequence for target(s) `all' is [fetch, build, all]

* Complete build sequence is [fetch, build, all, ]

*

Can any one help me on this.