Hi Irfan, You need a manifest file with a main class attribute. A quick googling of 'jar main-class' brings back a wealth of links to check out. Here's one: http://java.sun.com/developer/Books/javaprogramming/JAR/basics/run.html Thanks, Kevin
________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 18, 2008 3:26 AM To: user@ant.apache.org Subject: unable to execute JAR file Hi All, I have 10 java files and I have written Ant build.xml to compile and create JAR file which contains the .class files. Now my requirement is that I need to execute/install the JAR file but unfortunately I can't do this as I am getting following error. D:\Irfan\Manvendra Singh java code\Manvendra Singh java code>java -jar test.jar Failed to load Main-Class manifest attribute from test.jar D:\Irfan\Manvendra Singh java code\Manvendra Singh java code> Please find the attached java code and build script. Please help Regards Irfan. ************************************************************************* This communication, including attachments, is for the exclusive use of addressee and may contain proprietary, confidential and/or privileged information. If you are not the intended recipient, any use, copying, disclosure, dissemination or distribution is strictly prohibited. If you are not the intended recipient, please notify the sender immediately by return e-mail, delete this communication and destroy all copies. *************************************************************************