Product entity with attribute name called value (float/decimal) throws to evaluate expression. I made a separate check for not empty and in debug object is there. But ended up with below. Please share your suggestions. com.mendix.modules.microflowengine.MicroflowException: Failed to evaluate expression, error occurred on line 2, character 4 if $Product !=empty then if $Product/value > 0 ^ then true else false else false at Module.MicroflowName (Change : 'Change 'NewProduct' (product_value)') Advanced stacktrace: at com.mendix.languages.mxexpressions.MxExpression.evaluate(MxExpression.scala:16) Caused by: com.mendix.languages.expressions.ExpressionException: com.mendix.languages.expressions.ExpressionException: com.mendix.languages.expressions.ExpressionException: java.lang.IllegalArgumentException: Left and right hand side of binary expression should not be empty at com.mendix.languages.expressions.Expr.evaluate(Expr.java:28) Caused by: com.mendix.languages.expressions.ExpressionException: com.mendix.languages.expressions.ExpressionException: java.lang.IllegalArgumentException: Left and right hand side of binary expression should not be empty at com.mendix.languages.expressions.Expr.evaluate(Expr.java:28) Caused by: com.mendix.languages.expressions.ExpressionException: java.lang.IllegalArgumentException: Left and right hand side of binary expression should not be empty at com.mendix.languages.expressions.Expr.evaluate(Expr.java:30) Caused by: java.lang.IllegalArgumentException: Left and right hand side of binary expression should not be empty at com.mendix.languages.expressions.BinaryExpr.evaluateArithmeticOrComparisonExpression(BinaryExpr.java:164) at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.java:88) at com.mendix.languages.expressions.Expr.evaluate(Expr.java:26) at com.mendix.languages.expressions.IfExpr.evaluateExpression(IfExpr.java:28) at com.mendix.languages.expressions.Expr.evaluate(Expr.java:26) at com.mendix.languages.expressions.IfExpr.evaluateExpression(IfExpr.java:30) at com.mendix.languages.expressions.Expr.evaluate(Expr.java:26) at com.mendix.languages.mxexpressions.MxExpression.evaluate(MxExpression.scala:14) at com.mendix.modules.microflowengine.actions.mxobject.ChangeItemsExecutor$class.com$mendix$modules$microflowengine$actions$mxobject$ChangeItemsExecutor$$processActionItem(ChangeItemsExecutor.scala:77) at com.mendix.modules.microflowengine.actions.mxobject.ChangeItemsExecutor$$anonfun$executeChanges$1.apply(ChangeItemsExecutor.scala:44) at com.mendix.modules.microflowengine.actions.mxobject.ChangeItemsExecutor$$anonfun$executeChanges$1.apply(ChangeItemsExecutor.scala:43) at scala.collection.Iterator$class.foreach(Iterator.scala:743) at scala.collection.AbstractIterator.foreach(Iterator.scala:1174) at scala.collection.IterableLike$class.foreach(IterableLike.scala:72) at scala.collection.AbstractIterable.foreach(Iterable.scala:54) at com.mendix.modules.microflowengine.actions.mxobject.ChangeItemsExecutor$class.executeChanges(ChangeItemsExecutor.scala:42) at com.mendix.modules.microflowengine.actions.mxobject.ChangeAction.executeChanges(ChangeAction.scala:17) at com.mendix.modules.microflowengine.actions.mxobject.ChangeAction.execute(ChangeAction.scala:45) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.java:47) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.java:192) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.java:149) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:49) at com.mendix.core.actionmanagement.CoreAction.doCall(CoreAction.java:260) at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:248) at com.mendix.core.actionmanagement.CustomActionMonitorImpl$$anonfun$run$1.apply(CustomMonitoredAction.scala:14) at com.mendix.core.session.Worker$$anonfun$receive$3$$anonfun$2$$anon$1.execute(ActionDispatching.scala:145) at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32) at com.mendix.core.session.Worker$$anonfun$receive$3$$anonfun$2.apply(ActionDispatching.scala:147) at scala.util.Try$.apply(Try.scala:191) at com.mendix.core.session.Worker$$anonfun$receive$3.applyOrElse(ActionDispatching.scala:141) at akka.actor.Actor$class.aroundReceive(Actor.scala:465) at com.mendix.core.session.Worker.aroundReceive(ActionDispatching.scala:137) at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516) at akka.actor.ActorCell.invoke(ActorCell.scala:487) at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238) at akka.dispatch.Mailbox.run(Mailbox.scala:220) at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393) at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
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