Facing issue when i try to open region in a dialog box

013-04-04 01:59:39,198 [[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'] ERROR exception.EMRuntimeExceptionFilter logp.251 - javax.el.ELException: java.lang.NullPointerException
javax.el.ELException: java.lang.NullPointerException
at com.sun.el.parser.AstValue.invoke(AstValue.java:191)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
at oracle.adf.controller.internal.util.ELInterfaceImpl.invokeMethod(ELInterfaceImpl.java:173)
at oracle.adfinternal.controller.activity.MethodCallActivityLogic.execute(MethodCallActivityLogic.java:162)
at oracle.adfinternal.controller.engine.ControlFlowEngine.executeActivity(ControlFlowEngine.java:1035)
at oracle.adfinternal.controller.engine.ControlFlowEngine.doRouting(ControlFlowEngine.java:940)
at oracle.adfinternal.controller.engine.ControlFlowEngine.doRouting(ControlFlowEngine.java:820)
at oracle.adfinternal.controller.engine.ControlFlowEngine.handleException(ControlFlowEngine.java:748)
at oracle.adfinternal.controller.engine.ControlFlowEngine.invokeDialogTaskFlow(ControlFlowEngine.java:317)
at oracle.adfinternal.controller.application.DialogRequestHandler.invokeDialogTaskFlow(DialogRequestHandler.java:85)
at oracle.adfinternal.controller.application.DialogRequestHandler.doCreateView(DialogRequestHandler.java:54)
at oracle.adfinternal.controller.application.BaseRequestHandlerImpl.createView(BaseRequestHandlerImpl.java:57)
at org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.createView(ViewHandlerImpl.java:95)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._restoreView(LifecycleImpl.java:794)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:401)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:197)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:205)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
What is possibly going wrong
My method call is
<method-call id="initializeModel">
<method>#{pageFlowScope.e2e_model_ad4j_JDBCUrlDBTargetModel.initializeData}</method>
<parameter>
<class>java.lang.String</class>
<value>#{pageFlowScope.e2e_model_ad4j_JDBCUrlDBTargetModel.jdbcUrlHash}</value>
</parameter>
<outcome>
<to-string/>
</outcome>
</method-call>

Hello David.
It's possible that you are having a problem with some Firefox add-on that is hindering your Firefox's normal behavior. Have you tried disabling all add-ons (just to check), to see if Firefox goes back to normal?
Whenever you have a problem with Firefox, whatever it is, you should make sure it's not caused by one (or more than one) of your installed add-ons, be it an extension, a theme or a plugin. To do that easily and cleanly, run Firefox in [http://support.mozilla.com/en-US/kb/Safe+Mode safe mode] (don't forget to select ''Disable all add-ons'' when you start safe mode). If the problem disappears, you know it's from an add-on. Disable them all in normal mode, and enable them one at a time until you find the source of the problem. See [http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes this article] for information about troubleshooting extensions and themes and [https://support.mozilla.com/en-US/kb/Troubleshooting+plugins this one] for plugins.
If you need support for one of your add-ons, you'll have to contact its author.
If the problem is not disappears when all add-ons are disabled, please tell me, so we can work from there.

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