How to solve this error in a microflow: Change object Some(Cart) should not be null.

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/file?guid=19703248378920912     There is nothing in the Cart(TotalPrice) entity still showing this error: An error has occurred while handling the request. [User 'QWERT1234567' with session id 'f60dd183-XXXX-XXXX-XXXX-XXXXXXXXfc7f' and roles 'Customer'] -------- com.mendix.modules.microflowengine.MicroflowException: Change object 'Some(Cart)' should not be null    at OMS.Add_To_Cart (Change : 'Change 'Cart' (TotalPrice)') Advanced stacktrace:    at com.mendix.modules.microflowengine.MicroflowUtil.processException(MicroflowUtil.java:83) Caused by: java.lang.IllegalArgumentException: Change object 'Some(Cart)' should not be null    at com.mendix.modules.microflowengine.actions.mxobject.ChangeAction.execute(ChangeAction.scala:43)    at com.mendix.modules.microflowengine.actions.mxobject.ChangeAction.execute(ChangeAction.scala:12)    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$2(MicroflowImpl.scala:167)    at scala.Option.flatMap(Option.scala:283)    at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.scala:167)    at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.scala:114)    at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:58)    at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71)    at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:48)    at com.mendix.core.actionmanagement.internal.InternalCoreAction.call(InternalCoreAction.java:56)    at com.mendix.basis.actionmanagement.ActionManager.$anonfun$executeSync$2(ActionManager.scala:106)    at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20)    at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:105)    at com.mendix.basis.actionmanagement.MicroflowCallBuilderImpl.execute(MicroflowCallBuilderImpl.scala:62)    at com.mendix.webui.actions.client.ExecuteMicroflowAction.runMicroflow(ExecuteMicroflowAction.scala:76)    at com.mendix.webui.actions.client.ExecuteMicroflowAction.$anonfun$apply$3(ExecuteMicroflowAction.scala:42)    at com.mendix.webui.actions.client.RegularClientAction$Helpers$.$anonfun$liftEither$1(RegularClientAction.scala:30)    at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.$anonfun$apply$4(RegularClientAction.scala:56)    at com.mendix.webui.requesthandling.helpers.StateHandling.withState(StateHandling.scala:42)    at com.mendix.webui.requesthandling.helpers.StateHandling.withState$(StateHandling.scala:39)    at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.withState(RegularClientAction.scala:46)    at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.apply(RegularClientAction.scala:54)    at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.apply(RegularClientAction.scala:46)    at com.mendix.webui.actions.client.ExecuteMicroflowAction.apply(ExecuteMicroflowAction.scala:43)    at com.mendix.webui.actions.client.ExecuteMicroflowAction.apply(ExecuteMicroflowAction.scala:22)    at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$3(RegularClientAction.scala:113)    at scala.util.Try$.apply(Try.scala:210)    at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2(RegularClientAction.scala:113)    at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2$adapted(RegularClientAction.scala:111)    at com.mendix.webui.requesthandling.helpers.ContextHandling.$anonfun$inContext$5(ContextHandling.scala:57)    at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)    at com.mendix.basis.actionmanagement.ActionMonitoring$.$anonfun$monitor$1(ActionMonitoring.scala:49)    at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20)    at com.mendix.basis.actionmanagement.ActionMonitoring$.monitor(ActionMonitoring.scala:49)    at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:57)    at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:31)    at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:87)    at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:28)    at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:20)    at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:87)    at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$1(RegularClientAction.scala:111)    at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)    at com.mendix.webui.requesthandling.helpers.ProfileHandling.profileRequest(ProfileHandling.scala:14)    at com.mendix.webui.requesthandling.helpers.ProfileHandling.profileRequest$(ProfileHandling.scala:10)    at com.mendix.webui.actions.client.RegularClientAction.profileRequest(RegularClientAction.scala:87)    at com.mendix.webui.actions.client.RegularClientAction.execute(RegularClientAction.scala:108)    at com.mendix.webui.requesthandling.ClientRequestHandler.handleAction(ClientRequestHandler.scala:106)    at com.mendix.webui.requesthandling.ClientRequestHandler.processRequest(ClientRequestHandler.scala:79)    at com.mendix.externalinterface.connector.RequestHandler.doProcessRequest(RequestHandler.java:37)    at com.mendix.external.connector.MxRuntimeConnector.$anonfun$processRequest$1(MxRuntimeConnector.scala:50)    at com.mendix.external.connector.MxRuntimeConnector.$anonfun$processRequest$1$adapted(MxRuntimeConnector.scala:50)    at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20)    at com.mendix.external.connector.MxRuntimeConnector.processRequest(MxRuntimeConnector.scala:50)    at com.mendix.basis.impl.MxRuntimeImpl.processRequest(MxRuntimeImpl.scala:221)    at com.mendix.m2ee.appcontainer.server.handler.RuntimeServlet.service(RuntimeServlet.scala:25)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)    at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1631)    at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:230)    at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)    at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:548)    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440)    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1355)    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)    at org.eclipse.jetty.server.Server.handle(Server.java:516)    at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:487)    at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:732)    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:479)    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)    at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)    at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:409)    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)    at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)    at java.base/java.lang.Thread.run(Thread.java:829)     Can anyone suggest me kindly how to solve this error. 
asked
1 answers
1

Hi Riya,

 

The error is thrown because you try to change the value TotalPrice of an empty Object. The retrieval of the Cart is not getting a single Cart object. Or you pass an empty Cart as the Parameter of your Microflow.

 

If you set a breakpoint on the change, you can validate that there is no object (null) for the change action.

 

Go Make It

answered