Ant build to fail but always execute a target in Jenkins - ant

Question

[Solved] - The correct ant contrib jar was not getting picked up from the default location on my system. Have to give path manually in the build xml like this:
<taskdef resource="net/sf/antcontrib/antlib.xml">
<classpath>
<pathelement location="/usr/share/ant/lib/ant-contrib-1.0b3.jar"/>
</classpath>
</taskdef>
-------------------------------------------
Q: I have a python script that is run through ant/Jenkins like this:
<project name="prjName">
<target name="preRun" description="do something">
....
</target>
<target name="Run" description="Run the python script">
<exec executable="python" failonerror="true">
<arg value="${basedir}/run.py" />
<arg value="something" />
</exec>
</target>
<target name="other1" description="do something">
....
</target>
<target name="other2" description="do something">
....
</target>
</project>
Now this python script runs an external tool (web-inject which produces some result files) and keeps on scanning for the word FAIL in the logs. As soon as it finds FAIL, it does sys.exit("Error")
Thus the build fails but I still want to execute the target - other1. Is it possible through try-catch? I am doing it like this but it isn't working
<macrodef name="test-case">
<sequential>
<trycatch>
<try>
<exec executable="python" failonerror="true">
<arg value="${basedir}/read.py" />
</exec>
</try>
<catch>
<echo>Investigate exceptions in the run!</echo>
</catch>
<finally>
<antcall target="other1" />
</finally>
</trycatch>
</sequential>
</macrodef>
<target name="other1" description="do something">
....
</target>