Left and right hand side of binary expression should not be empty

0
An error has occurred while handling the request. [User 'Karthik' with session id 'cbb28fcb-XXXX-XXXX-XXXX-XXXXXXXXa338' and roles 'SAC_User'] -------- com.mendix.webui.WebUIException: Exception while executing runtime operation     at com.mendix.webui.actions.client.RuntimeOperationAction.$anonfun$apply$1(RuntimeOperationAction.scala:56) Caused by: com.mendix.modules.microflowengine.MicroflowException: Failed to evaluate expression, error occurred on line 1, character 32 (($Day4_Value)-($Day3_Value)):($Day4/Day-$Day3/Day)                                ^     at ETC.SUB_SlopeBasedOutlier_Day4 (CreateOrChangeVariable : 'Create Decimal variable')     at ETC.OC_OutlierRemoval.nested.99670ac9-6d0f-4cb8-af70-a44c0f1a3f18 [0 of 10] (SubMicroflow : 'SUB_SlopeBasedOutlier_Day4')     at ETC.OC_OutlierRemoval (ListLoop : '') Advanced stacktrace:     at com.mendix.languages.mxexpressions.MxExpressionImpl.evaluate(MxExpressionImpl.scala:32) Caused by: com.mendix.languages.expressions.ExpressionException: Left and right hand side of binary expression should not be empty     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:16) Caused by: java.lang.IllegalArgumentException: Left and right hand side of binary expression should not be empty     at com.mendix.languages.expressions.BinaryExpr$$anonfun$error$1.applyOrElse(BinaryExpr.scala:50)     at com.mendix.languages.expressions.BinaryExpr$$anonfun$error$1.applyOrElse(BinaryExpr.scala:48)     at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:35)     at com.mendix.languages.expressions.BinaryExpr$$anonfun$subtract$1.applyOrElse(BinaryExpr.scala:99)     at com.mendix.languages.expressions.BinaryExpr$$anonfun$subtract$1.applyOrElse(BinaryExpr.scala:99)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:32)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:31)     at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13)     at com.mendix.languages.mxexpressions.MxExpressionImpl.evaluate(MxExpressionImpl.scala:25)     at com.mendix.languages.mxexpressions.MxExpressionImpl.evaluate(MxExpressionImpl.scala:15)     at com.mendix.modules.microflowengine.actions.variable.CreateOrChangeVariableAction.$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$2(MicroflowImpl.scala:167)     at scala.Option.flatMap(Option.scala:283)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.scala:167)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.scala:114)     at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:58)     at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71)     at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:48)     at com.mendix.core.actionmanagement.internal.InternalCoreAction.call(InternalCoreAction.java:56)     at com.mendix.basis.actionmanagement.ActionManager.$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.component.ExecutionCore.doExecuteSync(ExecutionCore.scala:148)     at com.mendix.basis.component.ExecutionCore.doExecuteSync$(ExecutionCore.scala:147)     at com.mendix.basis.component.InternalCore.doExecuteSync(InternalCore.scala:24)     at com.mendix.basis.component.ExecutionCore.executeSync(ExecutionCore.scala:97)     at com.mendix.basis.component.ExecutionCore.executeSync$(ExecutionCore.scala:94)     at com.mendix.basis.component.InternalCore.executeSync(InternalCore.scala:24)     at com.mendix.modules.microflowengine.MicroflowExecuter$.executeSync(MicroflowExecuter.scala:19)     at com.mendix.modules.microflowengine.actions.SubMicroflowAction.execute(SubMicroflowAction.scala:37)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.$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$2(ActionManager.scala:104)     at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20)     at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:103)     at com.mendix.basis.component.ExecutionCore.doExecuteSync(ExecutionCore.scala:148)     at com.mendix.basis.component.ExecutionCore.doExecuteSync$(ExecutionCore.scala:147)     at com.mendix.basis.component.InternalCore.doExecuteSync(InternalCore.scala:24)     at com.mendix.basis.component.ExecutionCore.executeSync(ExecutionCore.scala:97)     at com.mendix.basis.component.ExecutionCore.executeSync$(ExecutionCore.scala:94)     at com.mendix.basis.component.InternalCore.executeSync(InternalCore.scala:24)     at com.mendix.modules.microflowengine.actions.loops.LoopAction.executeLoopBody(LoopAction.scala:46)     at com.mendix.modules.microflowengine.actions.loops.LoopAction.executeLoopBody$(LoopAction.scala:44)     at com.mendix.modules.microflowengine.actions.loops.ListLoopMicroflowAction.executeLoopBody(ListLoopMicroflowAction.scala:12)     at com.mendix.modules.microflowengine.actions.loops.ListLoopMicroflowAction.$anonfun$executeLoop$2(ListLoopMicroflowAction.scala:43)     at com.mendix.modules.microflowengine.actions.loops.ListLoopMicroflowAction.$anonfun$executeLoop$2$adapted(ListLoopMicroflowAction.scala:35)     at scala.collection.IterableOnceOps.foreach(IterableOnce.scala:575)     at scala.collection.IterableOnceOps.foreach$(IterableOnce.scala:573)     at scala.collection.AbstractIterable.foreach(Iterable.scala:933)     at scala.collection.IterableOps$WithFilter.foreach(Iterable.scala:903)     at com.mendix.modules.microflowengine.actions.loops.ListLoopMicroflowAction.executeLoop(ListLoopMicroflowAction.scala:35)     at com.mendix.modules.microflowengine.actions.loops.LoopAction.execute(LoopAction.scala:26)     at com.mendix.modules.microflowengine.actions.loops.LoopAction.execute$(LoopAction.scala:24)     at com.mendix.modules.microflowengine.actions.loops.ListLoopMicroflowAction.execute(ListLoopMicroflowAction.scala:26)     at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.$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$2(ActionManager.scala:104)     at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20)     at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:103)     at com.mendix.basis.actionmanagement.MicroflowCallBuilderImpl.execute(MicroflowCallBuilderImpl.scala:62)     at com.mendix.webui.actions.client.MicroflowRuntimeOperationExecutor.runMicroflow(MicroflowRuntimeOperationExecutor.scala:105)     at com.mendix.webui.actions.client.MicroflowRuntimeOperationExecutor.$anonfun$apply$4(MicroflowRuntimeOperationExecutor.scala:56)     at com.mendix.webui.actions.client.RegularClientAction$Helpers$.$anonfun$liftEither$1(RegularClientAction.scala:30)     at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.$anonfun$apply$4(RegularClientAction.scala:56)     at com.mendix.webui.requesthandling.helpers.StateHandling.withState(StateHandling.scala:45)     at com.mendix.webui.requesthandling.helpers.StateHandling.withState$(StateHandling.scala:42)     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.MicroflowRuntimeOperationExecutor.apply(MicroflowRuntimeOperationExecutor.scala:57)     at com.mendix.webui.actions.client.RuntimeOperationAction.$anonfun$apply$1(RuntimeOperationAction.scala:51)     at scala.util.Either.flatMap(Either.scala:352)     at com.mendix.webui.actions.client.RuntimeOperationAction.apply(RuntimeOperationAction.scala:38)     at com.mendix.webui.actions.client.RuntimeOperationAction.apply(RuntimeOperationAction.scala:29)     at com.mendix.webui.actions.client.RegularClientAction$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$1(ActionMonitoring.scala:49)     at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20)     at com.mendix.basis.actionmanagement.ActionMonitoring$.monitor(ActionMonitoring.scala:49)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:58)     at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(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: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$1(MxRuntimeConnector.scala:54)     at com.mendix.external.connector.MxRuntimeConnector.$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$Chain.doFilter(ServletHandler.java:1635)     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:527)     at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1571)     at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1383)     at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1544)     at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1305)     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)     at org.eclipse.jetty.server.Server.handle(Server.java:563)     at org.eclipse.jetty.server.HttpChannel.lambda$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$1.run(SelectableChannelEndPoint.java:53)     at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421)     at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390)     at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277)     at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.lambda$new$0(AdaptiveExecutionStrategy.java:139)     at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411)     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:933)     at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1077)     at java.base/java.lang.Thread.run(Thread.java:834)
asked
2 answers
1

 

In the stacktrace you find:

 Failed to evaluate expression, error occurred on line 1, character 32
(($Day4_Value)-($Day3_Value)):($Day4/Day-$Day3/Day)

 

Which means that something went broke by this variable $Day4_Value

 

The error “Left and right hand side of binary expression should not be empty” is telling you that calculating with an empty value is not possible.

 

Conclusion

Value of variable $Day4_Value is empty. 

 

Reason of this variable being empty lies somewhere before the action using this expression

answered
0

Hi Karthik,

As per my understanding, the “($Day4_Value)” is coming empty.

To fix this please put an empty check before the expression.

Regards, 

Vipul

answered