Resolution:
Description:
============
A pop up window shows a Null Pointer Exception message.  Look &ltworkspace>/.metadata/.log for the cause of the problem.

Environment:
==========
Windows.

Symptoms:
=========
The log file in this case showed the following:

!ENTRY com.tibco.cep.studio.ui 4 0 2011-10-12 12:23:54.311
!MESSAGE Enterprise Archive File has failed to build.
!STACK 0
java.lang.Exception: java.lang.NullPointerException
    at com.tibco.cep.studio.core.util.packaging.impl.DefaultRuntimeClassesPackager.close(Unknown Source)
    at com.tibco.cep.studio.core.util.packaging.impl.EMFBarPackager.close(Unknown Source)
    at com.tibco.cep.studio.core.util.packaging.impl.EMFEarPackager.close(Unknown Source)
    at com.tibco.cep.studio.ui.actions.BuildEnterpriseArchiveAction.runBuildArchive(Unknown Source)
    at com.tibco.cep.studio.ui.actions.BuildEnterpriseArchiveAction.access$0(Unknown Source)
    at com.tibco.cep.studio.ui.actions.BuildEnterpriseArchiveAction$BuildArchiveJob.run(Unknown Source)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: java.lang.NullPointerException
    at com.tibco.cep.modules.db.codegen.DBConceptClassGenerator.getPropertyColName(Unknown Source)
    at com.tibco.cep.modules.db.codegen.DBConceptClassGenerator.addDBConceptDelete(Unknown Source)
    at com.tibco.cep.modules.db.codegen.DBConceptClassGenerator.makeConceptFile(Unknown Source)
    at com.tibco.cep.modules.db.codegen.DBConceptCodeGenerator.generateConcept(Unknown Source)
    at com.tibco.cep.studio.parser.codegen.BaseGenerator.generateDBConcept(Unknown Source)
    at com.tibco.cep.studio.parser.codegen.BaseGenerator.generateConcept(Unknown Source)
    at com.tibco.cep.studio.parser.codegen.BaseGenerator.generate(Unknown Source)
    ... 7 more


Cause:
=====
The log pointed toward the problem of a Database Concept.  The user had imported database concepts but modified them afterward.  

Resolution:
=========
The user had removed a column that was stored as part of the primary key for the table in the metadata.  Restoring that column addressed the problem.

Attempting to generate an Enterprise Archinve (EAR) file from Studio and gives a Null Pointer Exception message box.