Unexpected runtime error

The runtime has encountered an unexpected error.

Error source

Page Name:/sessionsbytrack.xsp
Control Id: approveButton
Property: rendered

Exception

Error while executing JavaScript computed expression
Script interpreter error, line=1, col=24: 'sessions.getDocument()' is null

Javascript code

   1: sessions.getDocument().getItemValueString("Status") != "Approved" && hasRole("[Admin]")

► ▼ Stack Trace

com.ibm.xsp.exception.EvaluationExceptionEx: Error while executing JavaScript computed expression
    com.ibm.xsp.binding.javascript.JavaScriptValueBinding.getValue(JavaScriptValueBinding.java:132)
    javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:447)
    javax.faces.component.UIComponentBase.fillShadowedFlags(UIComponentBase.java:876)
    javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:944)
    com.ibm.xsp.component.UICommandEx2.encodeBegin(UICommandEx2.java:365)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:743)
    com.ibm.xsp.renderkit.FacesRenderer.encodeRecursive(FacesRenderer.java:72)
    com.ibm.xsp.renderkit.html_extended.HtmlBasicRenderer.encodeChildren(HtmlBasicRenderer.java:167)
    com.ibm.xsp.renderkit.ReadOnlyAdapterRenderer.encodeChildren(ReadOnlyAdapterRenderer.java:132)
    javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:975)
    com.ibm.faces.renderkit.html_extended.Utils.encodeComponent(Utils.java:182)
    com.ibm.faces.renderkit.html_extended.Utils.encodeComponent(Utils.java:187)
    com.ibm.faces.renderkit.html_extended.Utils.encodeComponent(Utils.java:187)
    com.ibm.faces.renderkit.html_extended.Utils.encodeComponent(Utils.java:187)
    com.ibm.faces.renderkit.html_extended.Utils.encodeComponent(Utils.java:187)
    com.ibm.xsp.renderkit.html_extended.IteratorRenderer.encodeChildren(IteratorRenderer.java:66)
    com.ibm.xsp.renderkit.ReadOnlyAdapterRenderer.encodeChildren(ReadOnlyAdapterRenderer.java:132)
    javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:975)
    com.ibm.xsp.component.UIDataIteratorEx.encodeChildren(UIDataIteratorEx.java:431)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:745)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.component.UIViewRootEx._renderView(UIViewRootEx.java:1043)
    com.ibm.xsp.component.UIViewRootEx.renderView(UIViewRootEx.java:1012)
    com.ibm.xsp.application.ViewHandlerExImpl.doRender(ViewHandlerExImpl.java:557)
    com.ibm.xsp.application.ViewHandlerExImpl._renderView(ViewHandlerExImpl.java:313)
    com.ibm.xsp.application.ViewHandlerExImpl.renderView(ViewHandlerExImpl.java:348)
    com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:103)
    com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:210)
    com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:120)
    com.ibm.xsp.controller.FacesControllerImpl.render(FacesControllerImpl.java:257)
    com.ibm.xsp.webapp.FacesServlet.serviceView(FacesServlet.java:198)
    com.ibm.xsp.webapp.FacesServletEx.serviceView(FacesServletEx.java:187)
    com.ibm.xsp.webapp.FacesServlet.service(FacesServlet.java:138)
    com.ibm.xsp.webapp.FacesServletEx.service(FacesServletEx.java:131)
    com.ibm.xsp.webapp.DesignerFacesServlet.service(DesignerFacesServlet.java:85)
    com.ibm.designer.runtime.domino.adapter.ComponentModule.invokeServlet(ComponentModule.java:464)
    com.ibm.domino.xsp.module.nsf.NSFComponentModule.invokeServlet(NSFComponentModule.java:673)
    com.ibm.designer.runtime.domino.adapter.ComponentModule$AdapterInvoker.invokeServlet(ComponentModule.java:730)
    com.ibm.designer.runtime.domino.adapter.ComponentModule$ServletInvoker.doService(ComponentModule.java:684)
    com.ibm.designer.runtime.domino.adapter.ComponentModule.doService(ComponentModule.java:453)
    com.ibm.domino.xsp.module.nsf.NSFComponentModule.doService(NSFComponentModule.java:657)
    com.ibm.domino.xsp.module.nsf.NSFService.doService(NSFService.java:247)
    com.ibm.designer.runtime.domino.adapter.LCDEnvironment.doService(LCDEnvironment.java:259)
    com.ibm.designer.runtime.domino.adapter.LCDEnvironment.service(LCDEnvironment.java:216)
    com.ibm.domino.xsp.bridge.http.engine.XspCmdManager.service(XspCmdManager.java:279)
com.ibm.jscript.InterpretException: Script interpreter error, line=1, col=24: 'sessions.getDocument()' is null
    java.lang.Throwable.(Throwable.java:67)
    com.ibm.commons.util.AbstractException.(AbstractException.java:51)
    com.ibm.jscript.JavaScriptException.(JavaScriptException.java:37)
    com.ibm.jscript.InterpretException.(InterpretException.java:60)
    com.ibm.jscript.ASTTree.ASTMember.interpret(ASTMember.java:97)
    com.ibm.jscript.ASTTree.ASTCall.interpret(ASTCall.java:87)
    com.ibm.jscript.ASTTree.binaryop.ASTBinaryDefaultOp.interpret(ASTBinaryDefaultOp.java:44)
    com.ibm.jscript.ASTTree.binaryop.ASTBinaryRelAnd.interpret(ASTBinaryRelAnd.java:59)
    com.ibm.jscript.ASTTree.ASTProgram.interpretEx(ASTProgram.java:102)
    com.ibm.jscript.JSExpression._interpretExpression(JSExpression.java:438)
    com.ibm.jscript.JSExpression.access$1(JSExpression.java:427)
    com.ibm.jscript.JSExpression$2.run(JSExpression.java:417)
    com.ibm.jscript.JSExpression$2.run(JSExpression.java)
    java.security.AccessController.doPrivileged(AccessController.java:284)
    com.ibm.jscript.JSExpression.interpretExpression(JSExpression.java:415)
    com.ibm.jscript.JSExpression.evaluateValue(JSExpression.java:250)
    com.ibm.jscript.JSExpression.evaluateValue(JSExpression.java:233)
    com.ibm.xsp.javascript.JavaScriptInterpreter.interpret(JavaScriptInterpreter.java:193)
    com.ibm.xsp.javascript.JavaScriptInterpreter.interpret(JavaScriptInterpreter.java:165)
    com.ibm.xsp.binding.javascript.JavaScriptValueBinding.getValue(JavaScriptValueBinding.java:78)
    javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:447)
    javax.faces.component.UIComponentBase.fillShadowedFlags(UIComponentBase.java:876)
    javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:944)
    com.ibm.xsp.component.UICommandEx2.encodeBegin(UICommandEx2.java:365)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:743)
    com.ibm.xsp.renderkit.FacesRenderer.encodeRecursive(FacesRenderer.java:72)
    com.ibm.xsp.renderkit.html_extended.HtmlBasicRenderer.encodeChildren(HtmlBasicRenderer.java:167)
    com.ibm.xsp.renderkit.ReadOnlyAdapterRenderer.encodeChildren(ReadOnlyAdapterRenderer.java:132)
    javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:975)
    com.ibm.faces.renderkit.html_extended.Utils.encodeComponent(Utils.java:182)
    com.ibm.faces.renderkit.html_extended.Utils.encodeComponent(Utils.java:187)
    com.ibm.faces.renderkit.html_extended.Utils.encodeComponent(Utils.java:187)
    com.ibm.faces.renderkit.html_extended.Utils.encodeComponent(Utils.java:187)
    com.ibm.faces.renderkit.html_extended.Utils.encodeComponent(Utils.java:187)
    com.ibm.xsp.renderkit.html_extended.IteratorRenderer.encodeChildren(IteratorRenderer.java:66)
    com.ibm.xsp.renderkit.ReadOnlyAdapterRenderer.encodeChildren(ReadOnlyAdapterRenderer.java:132)
    javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:975)
    com.ibm.xsp.component.UIDataIteratorEx.encodeChildren(UIDataIteratorEx.java:431)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:745)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.util.FacesUtil.renderComponent(FacesUtil.java:754)
    com.ibm.xsp.component.UIViewRootEx._renderView(UIViewRootEx.java:1043)
    com.ibm.xsp.component.UIViewRootEx.renderView(UIViewRootEx.java:1012)
    com.ibm.xsp.application.ViewHandlerExImpl.doRender(ViewHandlerExImpl.java:557)
    com.ibm.xsp.application.ViewHandlerExImpl._renderView(ViewHandlerExImpl.java:313)
    com.ibm.xsp.application.ViewHandlerExImpl.renderView(ViewHandlerExImpl.java:348)
    com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:103)
    com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:210)
    com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:120)
    com.ibm.xsp.controller.FacesControllerImpl.render(FacesControllerImpl.java:257)
    com.ibm.xsp.webapp.FacesServlet.serviceView(FacesServlet.java:198)
    com.ibm.xsp.webapp.FacesServletEx.serviceView(FacesServletEx.java:187)
    com.ibm.xsp.webapp.FacesServlet.service(FacesServlet.java:138)
    com.ibm.xsp.webapp.FacesServletEx.service(FacesServletEx.java:131)
    com.ibm.xsp.webapp.DesignerFacesServlet.service(DesignerFacesServlet.java:85)
    com.ibm.designer.runtime.domino.adapter.ComponentModule.invokeServlet(ComponentModule.java:464)
    com.ibm.domino.xsp.module.nsf.NSFComponentModule.invokeServlet(NSFComponentModule.java:673)
    com.ibm.designer.runtime.domino.adapter.ComponentModule$AdapterInvoker.invokeServlet(ComponentModule.java:730)
    com.ibm.designer.runtime.domino.adapter.ComponentModule$ServletInvoker.doService(ComponentModule.java:684)
    com.ibm.designer.runtime.domino.adapter.ComponentModule.doService(ComponentModule.java:453)
    com.ibm.domino.xsp.module.nsf.NSFComponentModule.doService(NSFComponentModule.java:657)
    com.ibm.domino.xsp.module.nsf.NSFService.doService(NSFService.java:247)
    com.ibm.designer.runtime.domino.adapter.LCDEnvironment.doService(LCDEnvironment.java:259)
    com.ibm.designer.runtime.domino.adapter.LCDEnvironment.service(LCDEnvironment.java:216)
    com.ibm.domino.xsp.bridge.http.engine.XspCmdManager.service(XspCmdManager.java:279)