Hello Viveknantham,


Difficult to say with so little data. For colleagues to be able to help will need more info, like:

General:
- Operating System and version.
- Java version.
- Liferay SDK version.
- Apache Ant version.
- XMLPortletFactory version.

Specific:
- Include Screen Shot (helpfull)
- Include XML definition file. (important)
- Include Error StackTrace (vital)
- Explanation of you where doing or trying to do. (helpful)

Saludos, Jack.