Hi Archit I got that jar file "ant-contrib-0.6.jar" from the sourceforge. I copied into the lib folder of the WebTest. But then also, I am getting the same error. BUILD FAILED I:\Program Files\Calypso\Calypso\WebTest\MarsSimp.xml:92: Could not = create task or type of type: trycatch. Thanks Meghanath =20 > =20 >=20