ISA Error NullPointerException

Hi Experts!
i am facing a big issue. I have built a custom application for ISA B2B and suddenly I am not able to log in anymore because i get the following error:
500 Internal Server Error
SAP J2EE Engine/7.00
Application error occurred during request processing.
Details: java.lang.NullPointerException: null
Exception id: [001A643650EE0075000000320000183000044F54BEB6F030]
I haven't done anything differnet from the usual process of deployment via NWDI to the CRM DEV server.
Can anybody help? it is urgent!

HI Sateesh -
i am following the procedure, but when i try to create re build and deploy i get hte following errors:
java.lang.NullPointerException
     at com.sap.tc.devconf.impl.DevelopmentComponentNode.resync(DevelopmentComponentNode.java:963)
     at com.sap.ide.eclipse.component.provider.actions.dc.DcCreateProjectAction$1.syncSelectedDCs(DcCreateProjectAction.java:456)
     at com.sap.ide.eclipse.component.provider.actions.dc.DcCreateProjectAction$1.execute(DcCreateProjectAction.java:237)
     at org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.java:71)
     at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1595)
     at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:85)
     at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:101)
Can you help?

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imports...
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r[0] = new Vector();
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r[0].addElement(new String("bbbb"));
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r[0] = new Vector();
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      } //end while connected == true
    } //end while true Main Loop
}//end processing_loop()
public static void main(String args[]){
     Example ex = new Example();
     ex.processing_loop();
}

The null pointer exception should be providing you with a stack trace. That tells you the exact line that the problem is on.
Note also that your code is doing to much. You should have code (a class) that does the database stuff all by itself. And then other code that does the socket stuff (a class).
You are also catching exceptions and then continuing down the same path that would have happened if the exception had not occurred. That is problematic.

ISA Error NullPointerException

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