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Hello,  I have a micrflow calculation which subtracts X number of months from a date a returns that value to an attribute.  It's used in two places, one is on the edit object page, the the other is in the wizard that creates the object. The Edit works perfectly, but the create returns an error. (stack trace below) There is differences between the create and edit. The edit only shows the date view of the entity which has the calculated value as an attribute. However, the created wizard has the entity as a nested dataview, and by association to another entity. Could this be causing this issue? Any help would be much appreciated.  Many thanks,  Garion   Stack Trace: null [User 'MxAdmin' with session id 'fa9fd2e3-d64e-4c4d-a657-81a48dfde9e0' and roles 'Administrator'] -------- com.mendix.core.CoreRuntimeException: An error occurred while executing the action 'DataManagement.CAL_BreakDateNotice'     at com.mendix.basis.objectmanagement.MendixObjectMemberImpl.getValue(MendixObjectMemberImpl.java:211) Caused by: com.mendix.modules.microflowengine.MicroflowException: Failed to evaluate expression, error occurred on line 1, character 1 addMonths($LeaseLicence/BreakDate,-$LeaseLicence/NoticePeriodMonth) ^     at DataManagement.CAL_BreakDateNotice (End : '') Advanced stacktrace:     at com.mendix.languages.mxexpressions.MxExpression.evaluate(MxExpression.scala:21) Caused by: com.mendix.languages.expressions.ExpressionException: java.lang.NullPointerException     at com.mendix.languages.expressions.Expr.evaluate(Expr.java:34) Caused by: java.lang.NullPointerException: null     at java.util.Calendar.setTime(Calendar.java:1770)     at com.mendix.languages.expressions.DateTimeFunctionCallEvaluator.evaluateAddTime(DateTimeFunctionCallEvaluator.java:161)     at com.mendix.languages.expressions.FunctionCallExpr.evaluateExpression(FunctionCallExpr.java:192)     at com.mendix.languages.expressions.Expr.evaluate(Expr.java:30)     at com.mendix.languages.mxexpressions.MxExpression.evaluate(MxExpression.scala:14)     at com.mendix.modules.microflowengine.microflow.impl.EndEvent.setReturnValue$1(EndEvent.scala:18)     at com.mendix.modules.microflowengine.microflow.impl.EndEvent.$anonfun$execute$1(EndEvent.scala:22)     at com.mendix.modules.microflowengine.microflow.impl.ExceptionHandler.executeWithExceptionHandling(ErrorEvent.scala:32)     at com.mendix.modules.microflowengine.microflow.impl.ExceptionHandler.executeWithExceptionHandling$(ErrorEvent.scala:30)     at com.mendix.modules.microflowengine.microflow.impl.EndEvent.executeWithExceptionHandling(EndEvent.scala:9)     at com.mendix.modules.microflowengine.microflow.impl.EndEvent.execute(EndEvent.scala:22)     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:79)     at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:57)     at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:55)     at com.mendix.basis.actionmanagement.ActionManager$1.execute(ActionManager.java:201)     at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32)     at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.java:206)     at com.mendix.basis.component.InternalCore.execute(InternalCore.java:659)     at com.mendix.basis.objectmanagement.MendixObjectMemberImpl.getValue(MendixObjectMemberImpl.java:209)     at com.mendix.webui.jsonserialization.MemberValueConverter$.getValue$1(MemberValueConverter.scala:24)     at com.mendix.webui.jsonserialization.MemberValueConverter$.transformOriginalMemberValue(MemberValueConverter.scala:35)     at com.mendix.webui.jsonserialization.MendixObjectConverter$.convertMemberValue(MendixObjectConverter.scala:71)     at com.mendix.webui.jsonserialization.MendixObjectConverter$.$anonfun$convertForAttributesMatching$3(MendixObjectConverter.scala:58)     at scala.collection.TraversableLike$WithFilter.$anonfun$map$2(TraversableLike.scala:739)     at scala.collection.immutable.HashMap$HashMap1.foreach(HashMap.scala:231)     at scala.collection.immutable.HashMap$HashTrieMap.foreach(HashMap.scala:462)     at scala.collection.TraversableLike$WithFilter.map(TraversableLike.scala:738)     at com.mendix.webui.jsonserialization.MendixObjectConverter$.convertForAttributesMatching(MendixObjectConverter.scala:57)     at com.mendix.webui.jsonserialization.MendixObjectConverter$.convert(MendixObjectConverter.scala:13)     at com.mendix.webui.requesthandling.RequestHandlingUtil$.$anonfun$getState$default$5$1(RequestHandlingUtil.scala:154)     at com.mendix.webui.requesthandling.RequestHandlingUtil$.$anonfun$getState$10(RequestHandlingUtil.scala:189)     at scala.collection.immutable.List.map(List.scala:283)     at com.mendix.webui.requesthandling.RequestHandlingUtil$.getState(RequestHandlingUtil.scala:189)     at com.mendix.webui.requesthandling.helpers.StateHandling.withState(StateHandling.scala:27)     at com.mendix.webui.requesthandling.helpers.StateHandling.withState$(StateHandling.scala:17)     at com.mendix.webui.requesthandling.ClientRequestHandler.withState(ClientRequestHandler.scala:29)     at com.mendix.webui.requesthandling.ClientRequestHandler.$anonfun$handleRequest$1(ClientRequestHandler.scala:185)     at com.mendix.webui.requesthandling.ClientRequestHandler.$anonfun$handleRequest$1$adapted(ClientRequestHandler.scala:171)     at com.mendix.webui.requesthandling.helpers.ContextHandling.$anonfun$inContext$4(ContextHandling.scala:41)     at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)     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.requesthandling.ClientRequestHandler.inContext(ClientRequestHandler.scala:29)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:24)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:19)     at com.mendix.webui.requesthandling.ClientRequestHandler.inContext(ClientRequestHandler.scala:29)     at com.mendix.webui.requesthandling.ClientRequestHandler.handleRequest(ClientRequestHandler.scala:171)     at com.mendix.webui.requesthandling.ClientRequestHandler.$anonfun$handleAction$1(ClientRequestHandler.scala:142)     at com.mendix.webui.requesthandling.helpers.ProfileHandling.profileRequest(ProfileHandling.scala:14)     at com.mendix.webui.requesthandling.helpers.ProfileHandling.profileRequest$(ProfileHandling.scala:10)     at com.mendix.webui.requesthandling.ClientRequestHandler.profileRequest(ClientRequestHandler.scala:29)     at com.mendix.webui.requesthandling.ClientRequestHandler.handleAction(ClientRequestHandler.scala:142)     at com.mendix.webui.requesthandling.ClientRequestHandler.processRequest(ClientRequestHandler.scala:102)     at com.mendix.externalinterface.connector.RequestHandler.doProcessRequest(RequestHandler.java:40)     at com.mendix.external.connector.MxRuntimeConnector$1.execute(MxRuntimeConnector.java:72)     at com.mendix.external.connector.MxRuntimeConnector$1.execute(MxRuntimeConnector.java:69)     at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32)     at com.mendix.external.connector.MxRuntimeConnector.processRequest(MxRuntimeConnector.java:75)     at com.mendix.basis.impl.MxRuntimeImpl.processRequest(MxRuntimeImpl.java:862)     at com.mendix.m2ee.appcontainer.server.handler.RuntimeHandler.service(RuntimeHandler.java:42)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:841)     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:535)     at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)     at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)     at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)     at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)     at org.eclipse.jetty.server.Server.handle(Server.java:561)     at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:334)     at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)     at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)     at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:104)     at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)     at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)     at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)     at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)     at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:243)     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:679)     at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:597)     at java.lang.Thread.run(Thread.java:748)  

asked 2018-07-03

3 answers