Publishing Failed in RAD 7 for WebSphere Portal Server 6

I'm trying to publish my portal application to WPS 6. I get the message "Could not publish to the server". Moreover the Details button is disabled.

I checked IBM\WebSphere\PortalServer\log folder, I could not find any related logs for this error. Please suggest ways / ideas / workarounds to proceed / resolve this issue.

RAD : 7.0.开发者_如何学编程0.4

WebSphere Portal: 6.0

Below is the steps i used to identify the issue.
1. I enabled Error Log View in Eclipse. (Windows -> Show View -> Error Log).
2. The Error log details gives sufficient information and stack trace to identify the issue.

     In this particular case, I found the exception to be  

java.lang.NullPointerException at com.ibm.etools.portal.server.tools.v6.internal.WPServerBehaviour.getSourceFiles(Unknown Source) Problem occurs if the project contains a file without any extension. Solution: http://www-01.ibm.com/support/docview.wss?uid=swg1PK55843