Error while performing excel export functiionality

0
An error has occurred while handling the request. [User 'MxAdmin' with session id 'd4e73dd1-XXXX-XXXX-XXXX-XXXXXXXX0feb' and roles 'SystemAdmin'] -------- com.mendix.core.CoreException: com.mendix.modules.microflowengine.MicroflowException: com.mendix.core.CoreRuntimeException: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException     at MyFirstModule.ACT_ExportDeclinedReportToExcel (JavaAction : 'GenerateExcelDoc') Advanced stacktrace:     at com.mendix.basis.component.InternalCoreBase.execute(InternalCoreBase.java:354) Caused by: com.mendix.modules.microflowengine.MicroflowException: com.mendix.core.CoreRuntimeException: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException     at MyFirstModule.ACT_ExportDeclinedReportToExcel (JavaAction : 'GenerateExcelDoc') Advanced stacktrace:     at com.mendix.modules.microflowengine.MicroflowUtil.processException(MicroflowUtil.java:146) Caused by: com.mendix.core.CoreException: com.mendix.core.CoreRuntimeException: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException     at com.mendix.basis.component.InternalCoreBase.execute(InternalCoreBase.java:383) Caused by: com.mendix.core.CoreRuntimeException: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException     at com.mendix.basis.actionmanagement.ActionManagerBase.executeSync(ActionManagerBase.java:155) Caused by: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException     at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:36) Caused by: java.lang.NullPointerException: null     at xlsreport.report.DataOQL.addAttribute(DataOQL.java:393)     at xlsreport.report.DataOQL.createOQLQuery(DataOQL.java:119)     at xlsreport.report.DataOQL.getRowData(DataOQL.java:82)     at xlsreport.actions.GenerateExcelDoc.executeAction(GenerateExcelDoc.java:133)     at xlsreport.actions.GenerateExcelDoc.executeAction(GenerateExcelDoc.java:1)     at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:46)     at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71)     at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:49)     at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:54)     at com.mendix.basis.actionmanagement.ActionManagerBase$1.execute(ActionManagerBase.java:146)     at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32)     at com.mendix.basis.actionmanagement.ActionManagerBase.executeSync(ActionManagerBase.java:151)     at com.mendix.basis.component.InternalCoreBase.execute(InternalCoreBase.java:379)     at com.mendix.modules.microflowengine.actions.actioncall.JavaAction.execute(JavaAction.scala:53)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.java:47)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.java:201)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.java:157)     at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:46)     at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71)     at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:49)     at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:54)     at com.mendix.basis.actionmanagement.ActionManagerBase$1.execute(ActionManagerBase.java:146)     at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32)     at com.mendix.basis.actionmanagement.ActionManagerBase.executeSync(ActionManagerBase.java:151)     at com.mendix.basis.component.InternalCoreBase.execute(InternalCoreBase.java:348)     at com.mendix.basis.component.InternalCoreBase.execute(InternalCoreBase.java:363)     at com.mendix.webui.actions.client.ExecuteMicroflowAction.runMicroflow(ExecuteMicroflowAction.scala:75)     at com.mendix.webui.actions.client.ExecuteMicroflowAction.apply(ExecuteMicroflowAction.scala:40)     at com.mendix.webui.actions.client.ExecuteMicroflowAction.apply(ExecuteMicroflowAction.scala:18)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$7(RegularClientAction.scala:63)     at com.mendix.webui.requesthandling.helpers.StateHandling.withState(StateHandling.scala:37)     at com.mendix.webui.requesthandling.helpers.StateHandling.withState$(StateHandling.scala:30)     at com.mendix.webui.actions.client.RegularClientAction.withState(RegularClientAction.scala:30)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$3(RegularClientAction.scala:61)     at scala.util.Try$.apply(Try.scala:213)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2(RegularClientAction.scala:54)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2$adapted(RegularClientAction.scala:53)     at com.mendix.webui.requesthandling.helpers.ContextHandling.$anonfun$inContext$3(ContextHandling.scala:41)     at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)     at com.mendix.basis.actionmanagement.IMonitoredAction$$anon$1.execute(IMonitoredAction.scala:47)     at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32)     at com.mendix.basis.actionmanagement.IMonitoredAction.monitor(IMonitoredAction.scala:49)     at com.mendix.basis.actionmanagement.IMonitoredAction.monitor$(IMonitoredAction.scala:25)     at com.mendix.webui.requesthandling.helpers.ContextHandling$ClientMonitoredAction.monitor(ContextHandling.scala:49)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:41)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:27)     at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:30)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:24)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:19)     at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:30)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$1(RegularClientAction.scala:53)     at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)     at com.mendix.webui.requesthandling.helpers.ProfileHandling.profileRequest(ProfileHandling.scala:14)     at com.mendix.webui.requesthandling.helpers.ProfileHandling.profileRequest$(ProfileHandling.scala:10)     at com.mendix.webui.actions.client.RegularClientAction.profileRequest(RegularClientAction.scala:30)     at com.mendix.webui.actions.client.RegularClientAction.execute(RegularClientAction.scala:50)     at com.mendix.webui.requesthandling.ClientRequestHandler.handleAction(ClientRequestHandler.scala:130)     at com.mendix.webui.requesthandling.ClientRequestHandler.processRequest(ClientRequestHandler.scala:107)     at com.mendix.externalinterface.connector.RequestHandler.doProcessRequest(RequestHandler.java:40)     at com.mendix.external.connector.MxRuntimeConnector$1.execute(MxRuntimeConnector.java:76)     at com.mendix.external.connector.MxRuntimeConnector$1.execute(MxRuntimeConnector.java:73)     at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32)     at com.mendix.external.connector.MxRuntimeConnector.processRequest(MxRuntimeConnector.java:79)     at com.mendix.basis.impl.MxRuntimeImpl.processRequest(MxRuntimeImpl.java:967)     at com.mendix.m2ee.appcontainer.server.handler.RuntimeHandler.service(RuntimeHandler.java:42)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:867)     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:542)     at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)     at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)     at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)     at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)     at org.eclipse.jetty.server.Server.handle(Server.java:502)     at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)     at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)     at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)     at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)     at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)     at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)     at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)     at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)     at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)     at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)     at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)     at java.base/java.lang.Thread.run(Thread.java:834)  
asked
3 answers
4

Hi,

it’s also possible that your export template is broken. This may happen when the MxReflection is not in sync with the template.

regards, Fabian

answered
0

The message “Null pointer exception” might be java trying to tell you something. My first guess would be that some of the data can not get exported by this user. Try to find out which column causes this. You can do so by removing them one by one until the export does work.

Maybe there is a column showing attribute-data from entity account, but not every object contains a relation to an account.

answered
0

To offer another possibility, although I don't have much experience with the module, you could check if you are trying to export calculated attributes. This modules retrieves data from the database, and calculated attributes are not in the database, which may result in an error.

answered