Dear team, Considering the documentation and example in the CSV-module and the responses on question https://community.mendix.com/link/space/studio-pro/questions/117175, I build following main microflow: This is all based on persistable entities: The deeper microflow is: and the main microflow is called by a button. The main microflow is working fine without the final 2 actions (Export CSV and Download). But the moment, I insert these two actions, following error message occurs: com.mendix.webui.WebUIException: Exception while executing runtime operation at com.mendix.webui.actions.client.RuntimeOperationAction.$anonfun$apply$1(RuntimeOperationAction.scala:52) Caused by: com.mendix.modules.microflowengine.MicroflowException: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException at MyFirstModule.Generate_MIC_BS (JavaAction : 'Export CSV') Advanced stacktrace: at com.mendix.modules.microflowengine.MicroflowUtil.processException(MicroflowUtil.java:83) Caused by: com.mendix.core.CoreRuntimeException: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:108) Caused by: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:23) Caused by: java.lang.NullPointerException: null at csv.actions.ExportCSV.executeAction(ExportCSV.java:72) at csv.actions.ExportCSV.executeAction(ExportCSV.java:33) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:58) at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71) at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:48) at com.mendix.core.actionmanagement.internal.InternalCoreAction.call(InternalCoreAction.java:56) at com.mendix.basis.actionmanagement.ActionManager.$anonfun$executeSync$2(ActionManager.scala:104) at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20) at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:103) at com.mendix.basis.actionmanagement.UserActionCallBuilderImpl.execute(UserActionCallBuilderImpl.scala:57) at com.mendix.modules.microflowengine.actions.actioncall.ForegroundJavaAction.doExecute(ForegroundJavaAction.scala:35) at com.mendix.modules.microflowengine.actions.actioncall.ForegroundJavaAction.doExecute(ForegroundJavaAction.scala:11) at com.mendix.modules.microflowengine.actions.actioncall.JavaAction.execute(JavaAction.scala:38) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.$anonfun$execute$1(MicroflowObject.scala:32) at scala.Option.flatMap(Option.scala:283) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.scala:29) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.$anonfun$executeAfterBreakingIfNecessary$2(MicroflowImpl.scala:167) at scala.Option.flatMap(Option.scala:283) and further... Could you please advise what I am doing wrong? Regards.
asked
Arno Bijl
1 answers
0
Hi Arno,
The error occurs at line 72 of the Java action which is:
this.separator.charAt(0),
So I think contrary to what the dialog says you do need to enter a separator in the Java action call.