Could not create java class error

Hello,
I am getting the following error when trying to test the VO that I extended on JDeveloper:
oracle.apps.fnd.framework.OAException: Could not create Java class: (oracle.apps.icx.por.wf.webui.WfDetailCO) associated with region: (PageLayoutRN). This is probably because the class name is wrong or not included in project.
     at oracle.apps.fnd.framework.webui.OAPageErrorHandler.prepareException(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageErrorHandler.processErrors(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)
     at OA.jspService(_OA.java:71)
     at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:462)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:713)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370)
     at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:871)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:453)
     at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:221)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:122)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:111)
     at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
     at java.lang.Thread.run(Thread.java:595)
## Detail 0 ##
oracle.apps.fnd.framework.OAException: Could not create Java class: (oracle.apps.icx.por.wf.webui.WfDetailCO) associated with region: (PageLayoutRN). This is probably because the class name is wrong or not included in project.
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.getController(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)
     at OA.jspService(_OA.java:71)
     at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:462)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:713)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370)
     at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:871)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:453)
     at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:221)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:122)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:111)
     at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
     at java.lang.Thread.run(Thread.java:595)
oracle.apps.fnd.framework.OAException: Could not create Java class: (oracle.apps.icx.por.wf.webui.WfDetailCO) associated with region: (PageLayoutRN). This is probably because the class name is wrong or not included in project.
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.getController(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)
     at OA.jspService(_OA.java:71)
     at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:462)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:713)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370)
     at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:871)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:453)
     at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:221)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:122)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:111)
     at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
     at java.lang.Thread.run(Thread.java:595)
I have the WfDetailCO.class file in myprojects and myclasses directories. Can anyone tell me what might be wrong?
Thanks in advance for your help

Hi Reetesh or any one...
We have an offering page in OLM which gave me a null pointer exception iitially with the following error:
oracle.apps.fnd.framework.OAException: java.lang.NullPointerException
     at oracle.apps.fnd.framework.OAException.wrapperException(OAException.java:891)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:603)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(OAPageLayoutHelper.java:1136)
     at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(OAPageLayoutBean.java:1569)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(OAFormBean.java:385)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(OABodyBean.java:353)
     at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java:2360)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1759)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:511)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:432)
     at oa_html._OA._jspService(_OA.java:84)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java:162)
     at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java:187)
     at oa_html._OA._jspService(_OA.java:94)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at org.apache.jserv.JServConnection.processRequest(JServConnection.java:456)
     at org.apache.jserv.JServConnection.run(JServConnection.java:294)
     at java.lang.Thread.run(Thread.java:619)
## Detail 0 ##
java.lang.NullPointerException
     at xxekgolm.oracle.apps.ota.admin.offering.webui.XXEKGMaintainOfferingCO.processRequest(XXEKGMaintainOfferingCO.java:95)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:587)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(OAPageLayoutHelper.java:1136)
     at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(OAPageLayoutBean.java:1569)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(OAFormBean.java:385)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(OABodyBean.java:353)
     at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java:2360)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1759)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:511)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:432)
     at oa_html._OA._jspService(_OA.java:84)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java:162)
     at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java:187)
     at oa_html._OA._jspService(_OA.java:94)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at org.apache.jserv.JServConnection.processRequest(JServConnection.java:456)
     at org.apache.jserv.JServConnection.run(JServConnection.java:294)
     at java.lang.Thread.run(Thread.java:619)
java.lang.NullPointerException
     at xxekgolm.oracle.apps.ota.admin.offering.webui.XXEKGMaintainOfferingCO.processRequest(XXEKGMaintainOfferingCO.java:95)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:587)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(OAPageLayoutHelper.java:1136)
     at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(OAPageLayoutBean.java:1569)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(OAFormBean.java:385)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(OABodyBean.java:353)
     at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java:2360)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1759)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:511)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:432)
     at oa_html._OA._jspService(_OA.java:84)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java:162)
     at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java:187)
     at oa_html._OA._jspService(_OA.java:94)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at org.apache.jserv.JServConnection.processRequest(JServConnection.java:456)
     at org.apache.jserv.JServConnection.run(JServConnection.java:294)
     at java.lang.Thread.run(Thread.java:619)
i opened the java file and found that there was a dummy method which was empty and thoght i might be causing that null pointer and so i removed the dummy method and bounced apache. Even now the page is erroring out but with different error
oracle.apps.fnd.framework.OAException: Could not create Java class: (xxekgolm.oracle.apps.ota.admin.offering.webui.XXEKGMaintainOfferingCO) associated with region: (MainRN). This is probably because the class name is wrong or not included in project.
     at oracle.apps.fnd.framework.webui.OAPageErrorHandler.prepareException(OAPageErrorHandler.java:1223)
     at oracle.apps.fnd.framework.webui.OAPageErrorHandler.processErrors(OAPageErrorHandler.java:1408)
     at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java:2406)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1759)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:511)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:432)
     at oa_html._OA._jspService(_OA.java:84)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java:162)
     at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java:187)
     at oa_html._OA._jspService(_OA.java:94)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at org.apache.jserv.JServConnection.processRequest(JServConnection.java:456)
     at org.apache.jserv.JServConnection.run(JServConnection.java:294)
     at java.lang.Thread.run(Thread.java:619)
## Detail 0 ##
oracle.apps.fnd.framework.OAException: Could not create Java class: (xxekgolm.oracle.apps.ota.admin.offering.webui.XXEKGMaintainOfferingCO) associated with region: (MainRN). This is probably because the class name is wrong or not included in project.
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.getController(OAWebBeanHelper.java:1876)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:559)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(OAPageLayoutHelper.java:1136)
     at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(OAPageLayoutBean.java:1569)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(OAFormBean.java:385)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(OABodyBean.java:353)
     at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java:2360)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1759)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:511)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:432)
     at oa_html._OA._jspService(_OA.java:84)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java:162)
     at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java:187)
     at oa_html._OA._jspService(_OA.java:94)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at org.apache.jserv.JServConnection.processRequest(JServConnection.java:456)
     at org.apache.jserv.JServConnection.run(JServConnection.java:294)
     at java.lang.Thread.run(Thread.java:619)
oracle.apps.fnd.framework.OAException: Could not create Java class: (xxekgolm.oracle.apps.ota.admin.offering.webui.XXEKGMaintainOfferingCO) associated with region: (MainRN). This is probably because the class name is wrong or not included in project.
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.getController(OAWebBeanHelper.java:1876)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:559)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(OAPageLayoutHelper.java:1136)
     at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(OAPageLayoutBean.java:1569)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(OAFormBean.java:385)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:959)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:926)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:646)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:247)
     at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(OABodyBean.java:353)
     at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java:2360)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1759)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:511)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:432)
     at oa_html._OA._jspService(_OA.java:84)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at oracle.jsp.provider.Jsp20RequestDispatcher.forward(Jsp20RequestDispatcher.java:162)
     at oracle.jsp.runtime.OraclePageContext.forward(OraclePageContext.java:187)
     at oa_html._OA._jspService(_OA.java:94)
     at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:119)
     at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java:417)
     at oracle.jsp.JspServlet.doDispatch(JspServlet.java:267)
     at oracle.jsp.JspServlet.internalService(JspServlet.java:186)
     at oracle.jsp.JspServlet.service(JspServlet.java:156)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:588)
     at org.apache.jserv.JServConnection.processRequest(JServConnection.java:456)
     at org.apache.jserv.JServConnection.run(JServConnection.java:294)
     at java.lang.Thread.run(Thread.java:619)
i checked and found that the Class file is present in the directory appropriately. can you please suggest some thing?
Thanks,
NG

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        at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:263)
        at org.eclipse.ui.internal.registry.ViewDescriptor.createView(ViewDescriptor.java:63)
        at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:324)
        at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:226)
        at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
        at org.eclipse.ui.internal.WorkbenchPage$ActivationList.setActive(WorkbenchPage.java:4212)
        at org.eclipse.ui.internal.WorkbenchPage$18.runWithException(WorkbenchPage.java:3271)
        at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
        at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
        at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
        at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3855)
        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3476)
        at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803)
        at org.eclipse.ui.internal.Workbench$28.runWithException(Workbench.java:1384)
        at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
        at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
        at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
        at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3855)
        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3476)
        at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2316)
        at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
        at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
        at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
        at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
        at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
        at com.adobe.flexbuilder.standalone.FlexBuilderApplication.start(FlexBuilderApplication.java :109)
        at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLau ncher.java:110)
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.jav a:79)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
        at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
        at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
    Caused by: org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter$TerminatingClassNotFoundExce ption: An error occurred while automatically activating bundle com.adobe.flexbuilder.codemodel (16).
        at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLa zyStarter.java:125)
        at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java :449)
        at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoade r.java:211)
        at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:381)
        at org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:3 3)
        at org.eclipse.osgi.internal.loader.MultiSourcePackage.loadClass(MultiSourcePackage.java:31)
        at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:454)
        at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
        at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:398)
        at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.jav a:105)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)
        ... 51 more
    Caused by: org.osgi.framework.BundleException: Exception in com.adobe.flexbuilder.codemodel.internal.bridge.CMBridge.start() of bundle com.adobe.flexbuilder.codemodel.
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextIm pl.java:806)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:7 55)
        at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:352)
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:280)
        at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:408)
        at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLa zyStarter.java:111)
        ... 62 more
    Caused by: java.nio.channels.OverlappingFileLockException
        at sun.nio.ch.FileChannelImpl$SharedFileLockTable.checkList(Unknown Source)
        at sun.nio.ch.FileChannelImpl$SharedFileLockTable.add(Unknown Source)
        at sun.nio.ch.FileChannelImpl.tryLock(Unknown Source)
        at java.nio.channels.FileChannel.tryLock(Unknown Source)
        at org.apache.lucene.store.NativeFSLock.obtain(NativeFSLockFactory.java:246)
        at org.apache.lucene.store.NativeFSLockFactory.acquireTestLock(NativeFSLockFactory.java:79)
        at org.apache.lucene.store.NativeFSLockFactory.setLockDir(NativeFSLockFactory.java:139)
        at org.apache.lucene.store.NativeFSLockFactory.<init>(NativeFSLockFactory.java:117)
        at com.adobe.flexbuilder.codemodel.internal.common.AbstractTextDatabase.start(AbstractTextDa tabase.java:111)
        at com.adobe.flexbuilder.codemodel.internal.search.ASSearchDataProvider.<init>(ASSearchDataP rovider.java:43)
        at com.adobe.flexbuilder.codemodel.internal.search.ASProviderFactory.createDataProvider(ASPr oviderFactory.java:47)
        at com.adobe.flexbuilder.codemodel.internal.search.SearchIndexManager.addISearchDataProvider dFactory(SearchIndexManager.java:70)
        at com.adobe.flexbuilder.codemodel.internal.CMCoreActivator.activate(CMCoreActivator.java:19 9)
        at com.adobe.flexbuilder.codemodel.internal.bridge.CMBridge.start(CMBridge.java:77)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:7 83)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextIm pl.java:774)
        ... 67 more

    I'm having this issue since ever with FB 4.7 (the normal IDE version, not the command-line one).
    The most consistent way I found to resolve it is to delete the output folders of all flex projects, then restart and perform a clean build.
    My suspect is that the incremental compilation is flawed, but cannot be sure of it.
    P.S. usually the initial error has this root exception
    Root exception:
    java.lang.NullPointerException
      at com.adobe.flexbuilder.codemodel.internal.bridge.WorkspaceSpecification.getStateLocation(W orkspaceSpecification.java:157)
      at com.adobe.flexbuilder.codemodel.internal.bridge.WorkspaceSpecification.getFileInStateLoca tion(WorkspaceSpecification.java:149)
      at com.adobe.flexbuilder.codemodel.internal.search.AbstractTextDatabase.start(AbstractTextDa tabase.java:81)
      at com.adobe.flexbuilder.codemodel.internal.search.ASSearchDataProvider.<init>(ASSearchDataP rovider.java:25)
      at com.adobe.flexbuilder.codemodel.internal.search.SearchIndexManager.initialize(SearchIndex Manager.java:155)
      at com.adobe.flexbuilder.codemodel.CMCoreActivator.activate(CMCoreActivator.java:189)
      at com.adobe.flexbuilder.codemodel.CMCoreActivator.start(CMCoreActivator.java:76)

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