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Dear Communities   I created a domain module attribute with microflow function for data grid2 Event_Overview record list can have multi-selection results, however after I did so, when I click the New button in Event_Overview page to open the new Event_NewEdit page for creating a new record, I got the error message, how to solve the problem?   An error has occurred while handling the request. [User 'Anonymous_8bbeaefa-bcd8-4918-a9b8-c17a005d87ad' with session id 'e23f3d51-XXXX-XXXX-XXXX-XXXXXXXX5027' and roles 'Administrator'] -------- com.mendix.webui.WebUIException: Exception while executing runtime operation     at com.mendix.webui.actions.client.RuntimeOperationAction.$anonfun$apply$1(RuntimeOperationAction.scala:60) Caused by: com.mendix.core.CoreRuntimeException: An error occurred while executing the action 'MyFirstModule.Get_ProductionLine'     at com.mendix.basis.objectmanagement.MendixObjectMemberImpl.getValue(MendixObjectMemberImpl.java:220) Caused by: com.mendix.modules.microflowengine.MicroflowException: Failed to evaluate expression, error occurred on line 1, character 1 substring($Variable,0,length($Variable)-1) ^     at MyFirstModule.Get_ProductionLine (CreateOrChangeVariable : 'Change variable Variable') Advanced stacktrace:     at com.mendix.languages.mxexpressions.MxExpressionImpl.evaluate(MxExpressionImpl.scala:32) Caused by: com.mendix.languages.expressions.ExpressionException: begin 0, end -1, length 0     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:16) Caused by: java.lang.StringIndexOutOfBoundsException: begin 0, end -1, length 0     at java.base/java.lang.String.checkBoundsBeginEnd(String.java:3319)     at java.base/java.lang.String.substring(String.java:1874)     at com.mendix.languages.expressions.StringFunctions$$anonfun$substring$1.applyOrElse(StringFunctions.scala:89)     at com.mendix.languages.expressions.StringFunctions$$anonfun$substring$1.applyOrElse(StringFunctions.scala:87)     at com.mendix.languages.expressions.FunctionCallExpr.evaluateExpression(FunctionCallExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.mxexpressions.MxExpressionImpl.evaluate(MxExpressionImpl.scala:25)     at com.mendix.languages.mxexpressions.MxExpressionImpl.evaluate(MxExpressionImpl.scala:15)     at com.mendix.modules.microflowengine.actions.variable.CreateOrChangeVariableAction.$anonfun$execute$2(CreateOrChangeVariableAction.scala:20)     at scala.Option.fold(Option.scala:263)     at com.mendix.modules.microflowengine.actions.variable.CreateOrChangeVariableAction.execute(CreateOrChangeVariableAction.scala:20)     at com.mendix.modules.microflowengine.actions.variable.CreateOrChangeVariableAction.execute(CreateOrChangeVariableAction.scala:10)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.$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$2(MicroflowImpl.scala:167)     at scala.Option.flatMap(Option.scala:283)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.scala:167)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.scala:114)     at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:58)     at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71)     at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:48)     at com.mendix.core.actionmanagement.internal.InternalCoreAction.call(InternalCoreAction.java:57)     at com.mendix.basis.actionmanagement.ActionManager.$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.basis.objectmanagement.MendixObjectMemberImpl.getValue(MendixObjectMemberImpl.java:218)     at com.mendix.webui.jsonserialization.ValueConverter$$anon$1.apply(ValueConverter.scala:31)     at com.mendix.webui.jsonserialization.ValueConverter$.convertValue(ValueConverter.scala:128)     at com.mendix.webui.jsonserialization.ValueConverter$.convertOriginalMemberValue(ValueConverter.scala:29)     at com.mendix.webui.jsonserialization.MendixObjectConverter$.convertMemberValue(MendixObjectConverter.scala:81)     at com.mendix.webui.jsonserialization.MendixObjectConverter$.$anonfun$convert$1(MendixObjectConverter.scala:34)     at scala.collection.MapView$MapValues.$anonfun$iterator$1(MapView.scala:119)     at scala.collection.Iterator$$anon$9.next(Iterator.scala:584)     at scala.collection.mutable.Growable.addAll(Growable.scala:62)     at scala.collection.mutable.Growable.addAll$(Growable.scala:57)     at scala.collection.immutable.MapBuilderImpl.addAll(Map.scala:690)     at scala.collection.immutable.Map$.from(Map.scala:641)     at scala.collection.IterableOnceOps.toMap(IterableOnce.scala:1293)     at scala.collection.IterableOnceOps.toMap$(IterableOnce.scala:1292)     at scala.collection.AbstractIterable.toMap(Iterable.scala:933)     at com.mendix.webui.jsonserialization.MendixObjectConverter$.convert(MendixObjectConverter.scala:34)     at com.mendix.webui.jsonserialization.MendixObjectConverter$.convert(MendixObjectConverter.scala:22)     at com.mendix.webui.jsonserialization.OutgoingState$.$anonfun$getResponse$1(OutgoingState.scala:37)     at scala.collection.immutable.List.map(List.scala:246)     at scala.collection.immutable.List.map(List.scala:79)     at com.mendix.webui.jsonserialization.OutgoingState$.getResponse(OutgoingState.scala:37)     at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.apply(RegularClientAction.scala:62)     at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.apply(RegularClientAction.scala:46)     at com.mendix.webui.actions.client.RuntimeOperationAction.executeObjectAction(RuntimeOperationAction.scala:85)     at com.mendix.webui.actions.client.RuntimeOperationAction.$anonfun$apply$1(RuntimeOperationAction.scala:56)     at scala.util.Either.flatMap(Either.scala:352)     at com.mendix.webui.actions.client.RuntimeOperationAction.apply(RuntimeOperationAction.scala:41)     at com.mendix.webui.actions.client.RuntimeOperationAction.apply(RuntimeOperationAction.scala:30)     at com.mendix.webui.actions.client.RegularClientAction$Helpers$.$anonfun$liftEither$1(RegularClientAction.scala:30)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$3(RegularClientAction.scala:120)     at scala.util.Try$.apply(Try.scala:210)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2(RegularClientAction.scala:120)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2$adapted(RegularClientAction.scala:118)     at com.mendix.webui.requesthandling.helpers.ContextHandling.$anonfun$inContext$7(ContextHandling.scala:58)     at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)     at com.mendix.basis.actionmanagement.ActionMonitoring$.$anonfun$monitor$1(ActionMonitoring.scala:52)     at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20)     at com.mendix.basis.actionmanagement.ActionMonitoring$.monitor(ActionMonitoring.scala:52)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:58)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:32)     at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:94)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:29)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:21)     at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:94)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$1(RegularClientAction.scala:118)     at scala.runtime.java8.JFunction0$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:94)     at com.mendix.webui.actions.client.RegularClientAction.execute(RegularClientAction.scala:115)     at com.mendix.webui.requesthandling.ClientRequestHandler.handleAction(ClientRequestHandler.scala:105)     at com.mendix.webui.requesthandling.ClientRequestHandler.processRequest(ClientRequestHandler.scala:78)     at com.mendix.externalinterface.connector.RequestHandler.doProcessRequest(RequestHandler.java:37)     at com.mendix.external.connector.MxRuntimeConnector.$anonfun$processRequest$1(MxRuntimeConnector.scala:54)     at com.mendix.external.connector.MxRuntimeConnector.$anonfun$processRequest$1$adapted(MxRuntimeConnector.scala:54)     at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20)     at com.mendix.external.connector.MxRuntimeConnector.processRequest(MxRuntimeConnector.scala:54)     at com.mendix.basis.impl.MxRuntimeImpl.processRequest(MxRuntimeImpl.scala:221)     at com.mendix.m2ee.appcontainer.server.handler.RuntimeServlet.service(RuntimeServlet.scala:40)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:750)     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)     at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1665)     at org.eclipse.jetty.websocket.servlet.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:170)     at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)     at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:527)     at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1570)     at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1385)     at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1543)     at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1307)     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)     at org.eclipse.jetty.server.Server.handle(Server.java:563)     at org.eclipse.jetty.server.HttpChannel.lambda$handle$0(HttpChannel.java:505)     at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:762)     at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:497)     at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:282)     at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)     at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)     at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)     at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:416)     at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:385)     at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:272)     at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.lambda$new$0(AdaptiveExecutionStrategy.java:140)     at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411)     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:936)     at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1080)     at java.base/java.lang.Thread.run(Thread.java:829)   Note, I did’t open the security option yet and I set the user role, the problem still there. Please help, thank you in advance.   Best regareds Li Dong

asked 2023-08-04

4 answers