Attached the exact screenshot here.Please check this

Hi Divyasree,

Thanks for posting on PSC.

I have reviewed the screen-shot shared, it doesn't have much detail about the probable root cause.

Kindly share the server log from server directory(\Apache\apache-tomcat-7.0.65_Pega73\logs) capturing the reported issue.

PFA working build.xml file. You can compare with yours as well.

Hi Divyasree,

You can also go through the below discussions as its similar issue other users had faced earlier,

https://pdn.pega.com/community/product-support/question/orgtp23antinsta…

https://pdn.pega.com/community/pega-product-support/question/hi-i-am-fa…

Make sure to use the ANT_HOME and supported JDK version as explained in the above discussions and look into the logs that will be generated in your installation media for more information.

Regards

Mahesh