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I have come across this error that I think may be and out of bounds error, but im not sure. I was wanting a second opinion on it.    An error has occurred while handling the request. [User 'MxAdmin' with session id '557c38e3-XXXX-XXXX-XXXX-XXXXXXXX697e' and roles 'Administrator'] -------- com.mendix.modules.microflowengine.MicroflowException: Failed to evaluate expression, error occurred on line 2, character 16 $SumDirectorUtil_Full  + parseInteger(substring($WeekSummary/Utilization1,0,max(1,length($WeekSummary/Utilization1)-1)))                 ^ + parseInteger(substring($WeekSummary/Utilization2,0,max(1,length($WeekSummary/Utilization2)-1))) + parseInteger(substring($WeekSummary/Utilization3,0,max(1,length($WeekSummary/Utilization3)-1))) + parseInteger(substring($WeekSummary/Utilization4,0,max(1,length($WeekSummary/Utilization4)-1))) + parseInteger(substring($WeekSummary/Utilization5,0,max(1,length($WeekSummary/Utilization5)-1))) + parseInteger(substring($WeekSummary/Utilization6,0,max(1,length($WeekSummary/Utilization6)-1))) + parseInteger(substring($WeekSummary/Utilization7,0,max(1,length($WeekSummary/Utilization7)-1))) + parseInteger(substring($WeekSummary/Utilization8,0,max(1,length($WeekSummary/Utilization8)-1))) + parseInteger(substring($WeekSummary/Utilization9,0,max(1,length($WeekSummary/Utilization9)-1))) + parseInteger(substring($WeekSummary/Utilization10,0,max(1,length($WeekSummary/Utilization10)-1))) + parseInteger(substring($WeekSummary/Utilization11,0,max(1,length($WeekSummary/Utilization11)-1)))  + parseInteger(substring($WeekSummary/Utilization12,0,max(1,length($WeekSummary/Utilization12)-1))) + parseInteger(substring($WeekSummary/Utilization13,0,max(1,length($WeekSummary/Utilization13)-1))) + parseInteger(substring($WeekSummary/Utilization14,0,max(1,length($WeekSummary/Utilization14)-1))) + parseInteger(substring($WeekSummary/Utilization15,0,max(1,length($WeekSummary/Utilization15)-1)))     at MyFirstModule.CalculateUtilization_2.nested.42a087a2-510b-476a-b731-abbce52edcfe [0 of 2] (CreateOrChangeVariable : 'Change variable SumDirectorUtil_Full')     at MyFirstModule.CalculateUtilization_2 (NestedLoopedMicroflow : '') Advanced stacktrace:     at com.mendix.languages.mxexpressions.MxExpression.evaluate(MxExpression.scala:33) Caused by: com.mendix.languages.expressions.ExpressionException: java.lang.StringIndexOutOfBoundsException: 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$$anonfun$substring$1.applyOrElse(StringFunctions.scala:61)     at com.mendix.languages.expressions.StringFunctions$$anonfun$substring$1.applyOrElse(StringFunctions.scala:57)     at com.mendix.languages.expressions.FunctionCallExpr.evaluateExpression(FunctionCallExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.FunctionCallExpr.$anonfun$evaluateExpression$1(FunctionCallExpr.scala:26)     at com.mendix.languages.expressions.FunctionCallExpr.$anonfun$evaluateExpression$1$adapted(FunctionCallExpr.scala:26)     at scala.collection.Iterator$$anon$23.next(Iterator.scala:1023)     at scala.collection.immutable.List.prependedAll(List.scala:153)     at scala.collection.immutable.List$.from(List.scala:651)     at scala.collection.immutable.List$.from(List.scala:648)     at scala.collection.SeqFactory$Delegate.from(Factory.scala:306)     at scala.collection.immutable.Seq$.from(Seq.scala:42)     at scala.collection.immutable.Seq$.from(Seq.scala:39)     at scala.collection.IterableFactory.tabulate(Factory.scala:200)     at scala.collection.IterableFactory.tabulate$(Factory.scala:200)     at scala.collection.SeqFactory$Delegate.tabulate(Factory.scala:303)     at com.mendix.languages.expressions.FunctionCallExpr.evaluateExpression(FunctionCallExpr.scala:26)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:30)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:27)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.mxexpressions.MxExpression.evaluate(MxExpression.scala:26)     at com.mendix.languages.mxexpressions.MxExpression.evaluate(MxExpression.scala:16)     at com.mendix.modules.microflowengine.actions.variable.CreateOrChangeVariableAction.$anonfun$execute$2(CreateOrChangeVariableAction.scala:28)     at scala.Option.fold(Option.scala:263)     at com.mendix.modules.microflowengine.actions.variable.CreateOrChangeVariableAction.execute(CreateOrChangeVariableAction.scala:28)     at com.mendix.modules.microflowengine.actions.variable.CreateOrChangeVariableAction.execute(CreateOrChangeVariableAction.scala:13)     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:172)     at scala.Option.flatMap(Option.scala:283)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.scala:172)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.scala:119)     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:147)     at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:26)     at com.mendix.basis.actionmanagement.ActionManagerBase.executeSync(ActionManagerBase.java:152)     at com.mendix.basis.component.InternalCoreBase.executeSync(InternalCoreBase.java:376)     at com.mendix.modules.microflowengine.actions.other.NestedLoopedMicroflowAction.$anonfun$executeLoop$2(NestedLoopedMicroflowAction.scala:67)     at com.mendix.modules.microflowengine.actions.other.NestedLoopedMicroflowAction.$anonfun$executeLoop$2$adapted(NestedLoopedMicroflowAction.scala:58)     at scala.collection.IterableOnceOps.foreach(IterableOnce.scala:563)     at scala.collection.IterableOnceOps.foreach$(IterableOnce.scala:561)     at scala.collection.AbstractIterable.foreach(Iterable.scala:919)     at scala.collection.IterableOps$WithFilter.foreach(Iterable.scala:889)     at com.mendix.modules.microflowengine.actions.other.NestedLoopedMicroflowAction.executeLoop(NestedLoopedMicroflowAction.scala:58)     at com.mendix.modules.microflowengine.actions.other.NestedLoopedMicroflowAction.execute(NestedLoopedMicroflowAction.scala:43)     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:172)     at scala.Option.flatMap(Option.scala:283)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.scala:172)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.scala:119)     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:147)     at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:26)     at com.mendix.basis.actionmanagement.ActionManagerBase.executeSync(ActionManagerBase.java:152)     at com.mendix.basis.actionmanagement.MicroflowCallBuilderImpl.execute(MicroflowCallBuilderImpl.scala:40)     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:29)     at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.$anonfun$apply$4(RegularClientAction.scala:55)     at com.mendix.webui.requesthandling.helpers.StateHandling.withState(StateHandling.scala:37)     at com.mendix.webui.requesthandling.helpers.StateHandling.withState$(StateHandling.scala:34)     at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.withState(RegularClientAction.scala:45)     at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.apply(RegularClientAction.scala:53)     at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.apply(RegularClientAction.scala:45)     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:109)     at scala.util.Try$.apply(Try.scala:210)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2(RegularClientAction.scala:109)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2$adapted(RegularClientAction.scala:107)     at com.mendix.webui.requesthandling.helpers.ContextHandling.$anonfun$inContext$5(ContextHandling.scala:47)     at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)     at com.mendix.basis.actionmanagement.IMonitoredAction$$anon$1.execute(IMonitoredAction.scala:47)     at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:26)     at com.mendix.basis.actionmanagement.IMonitoredAction.monitor(IMonitoredAction.scala:49)     at com.mendix.basis.actionmanagement.IMonitoredAction.monitor$(IMonitoredAction.scala:25)     at com.mendix.webui.requesthandling.helpers.ContextHandling$ClientMonitoredAction.monitor(ContextHandling.scala:59)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:47)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:27)     at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:86)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:24)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:19)     at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:86)     at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$1(RegularClientAction.scala:107)     at scala.runtime.java8.JFunction0$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:86)     at com.mendix.webui.actions.client.RegularClientAction.execute(RegularClientAction.scala:104)     at com.mendix.webui.requesthandling.ClientRequestHandler.handleAction(ClientRequestHandler.scala:105)     at com.mendix.webui.requesthandling.ClientRequestHandler.processRequest(ClientRequestHandler.scala:82)     at com.mendix.externalinterface.connector.RequestHandler.doProcessRequest(RequestHandler.java:46)     at com.mendix.external.connector.MxRuntimeConnector$1.execute(MxRuntimeConnector.java:76)     at com.mendix.external.connector.MxRuntimeConnector$1.execute(MxRuntimeConnector.java:73)     at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:26)     at com.mendix.external.connector.MxRuntimeConnector.processRequest(MxRuntimeConnector.java:79)     at com.mendix.basis.impl.MxRuntimeImplBase.processRequest(MxRuntimeImplBase.java:857)     at com.mendix.m2ee.appcontainer.server.handler.RuntimeServlet.service(RuntimeServlet.java:42)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)     at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1626)     at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:228)     at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)     at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:548)     at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)     at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1434)     at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)     at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1349)     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)     at org.eclipse.jetty.server.Server.handle(Server.java:516)     at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:388)     at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633)     at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380)     at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)     at org.eclipse.jetty.io.AbstractConnection$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:386)     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:834)     Below are some screenshots of where in the microflow its happening at.   

asked 2022-05-26

2 answers