Error on Opening "Embedded OC4J Server Preferences"

When I tried to open Tools-->Embedded OC4J Server Preferences, I got the following error:
java.lang.NullPointerException
     at oracle.ide.net.URLFactory.newURL(URLFactory.java:85)
     at oracle.jdevimpl.runner.oc4j.Oc4jWorkspaceConfig.transmogrifyConfigFiles(Oc4jWorkspaceConfig.java:224)
     at oracle.jdevimpl.runner.oc4j.Oc4jWorkspaceConfig.configureAll(Oc4jWorkspaceConfig.java:112)
     at oracle.jdevimpl.runner.oc4j.EmbeddedServerAdminCommand.doit(EmbeddedServerAdminCommand.java:50)
     at oracle.ide.CommandProcessor.invokeImpl(CommandProcessor.java:391)
     at oracle.ide.CommandProcessor.invoke(CommandProcessor.java:343)
     at oracle.ide.CommandProcessor.invoke(CommandProcessor.java:110)
     at oracle.ide.IdeAction.performAction(IdeAction.java:665)
     at oracle.ide.IdeAction$1.run(IdeAction.java:857)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
But it works in my colleague machine. What is wrong in my environment? We use Jdev 10g 9.05.1
Dan

If you have Web project, check if HTML Root Directory has got a Null value ?
Double-click on the project to bring up project properties
Select Input Paths
See the value for HTML Root Directory.
If it is Null or invalid, edit to make sure it is valid and Click ok.
If not, create a new/empty project and see if you can launch Embedded OC4J server preferences dialog for that project.
raghu
JDev Team

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Edited by: Saurabh on Nov 4, 2011 7:00 AM

When I try to open the Tools/Embedded OC4J Server Preferences...
the following error stack trace pops up:
java.lang.NullPointerException
     at oracle.ide.net.URLFactory.newURL(URLFactory.java:85)
     at oracle.jdevimpl.runner.oc4j.Oc4jWorkspaceConfig.transmogrifyConfigFiles(Oc4jWorkspaceConfig.java:224)
     at oracle.jdevimpl.runner.oc4j.Oc4jWorkspaceConfig.configureAll(Oc4jWorkspaceConfig.java:112)
     at oracle.jdevimpl.runner.oc4j.EmbeddedServerAdminCommand.doit(EmbeddedServerAdminCommand.java:50)
     at oracle.ide.CommandProcessor.invokeImpl(CommandProcessor.java:391)
     at oracle.ide.CommandProcessor.invoke(CommandProcessor.java:343)
     at oracle.ide.CommandProcessor.invoke(CommandProcessor.java:110)
     at oracle.ide.IdeAction.performAction(IdeAction.java:665)
     at oracle.ide.IdeAction$1.run(IdeAction.java:857)
     at java.awt.event.InvocationEvent.dispatch InvocationEvent.java:178)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
Any other way of checking the configuration? Corrupt files somewhere?
Thanks,
Gonzalo

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Hi all,
I have this in the Application Module as JDBC datasource: java:comp/env/jdbc/DBCON
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On the connections tab in JDeveloper I have made a database connection with the name DBCON.
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Unable to lookup Data Source at context java:comp/env/jdbc/DBCON
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int mypidm;
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