Mostly there is a second error just below this one with more information.
Hi Edwin,
This is the other errormessage:
An error has occurred while handling the request. [User 'Anonymous_80be1f74-0be9-4168-966c-9e3434952390' with session id '6a55118f-XXXX-XXXX-XXXX-XXXXXXXX67fb' and roles 'User']
--------
com.mendix.webui.WebUIException: Exception while executing runtime operation at com.mendix.webui.actions.client.RuntimeOperationAction.apply(RuntimeOperationAction.scala:72)
Caused by: com.mendix.core.CoreRuntimeException: An error occurred while executing the action 'MyFirstModule.CalculateTotalWattPeakMicroFlow' at com.mendix.basis.objectmanagement.MendixObjectMemberImpl.getValue(MendixObjectMemberImpl.java:228)
Caused by: com.mendix.modules.microflowengine.MicroflowException: Failed to evaluate expression, error occurred on line 1, character 1$ProjectModules/NumberOfModules * $ProjectModules/WattagePerModule^ at MyFirstModule.CalculateTotalWattPeakMicroFlow (CreateOrChangeVariable : 'Change variable TotalWattPeak')
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$$anonfun$multiply$1.applyOrElse(BinaryExpr.scala:104) at com.mendix.languages.expressions.BinaryExpr$$anonfun$multiply$1.applyOrElse(BinaryExpr.scala:104) at com.mendix.languages.expressions.BinaryExpr.evaluateExpression(BinaryExpr.scala:32) at com.mendix.languages.expressions.Expr.evaluate(Expr.scala:13) at com.mendix.languages.mxexpressions.MxExpressionImpl.evaluate(MxExpressionImpl.scala:25) at com.mendix.languages.mxexpressions.MxExpressionImpl.evaluate(MxExpressionImpl.scala:15) at com.mendix.modules.microflowengine.actions.variable.CreateOrChangeVariableAction.execute(CreateOrChangeVariableAction.scala:20) at com.mendix.modules.microflowengine.actions.variable.CreateOrChangeVariableAction.execute(CreateOrChangeVariableAction.scala:10) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.$anonfun$execute$1(MicroflowObject.scala:31) at scala.Option.flatMap(Option.scala:283) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.scala:28) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.scala:176) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.scala:116) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:58) at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71) at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:48) at com.mendix.core.actionmanagement.internal.InternalCoreAction.call(InternalCoreAction.java:57) at com.mendix.basis.actionmanagement.ActionManager.$anonfun$executeSync$2(ActionManager.scala:104) at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20) at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:103) at com.mendix.basis.actionmanagement.MicroflowCallBuilderImpl.execute(MicroflowCallBuilderImpl.scala:64) at com.mendix.basis.objectmanagement.MendixObjectMemberImpl.getValue(MendixObjectMemberImpl.java:226) at com.mendix.basis.objectmanagement.member.MendixIntegerImpl.getValue(MendixIntegerImpl.scala:20) at com.mendix.basis.objectmanagement.member.MendixIntegerImpl.getValue(MendixIntegerImpl.scala:11) at com.mendix.webui.jsonserialization.ValueConverter$$anon$1.apply(ValueConverter.scala:31) at com.mendix.webui.jsonserialization.ValueConverter$.convertValue(ValueConverter.scala:138) at com.mendix.webui.jsonserialization.ValueConverter$.convertOriginalMemberValue(ValueConverter.scala:29) at com.mendix.webui.jsonserialization.MendixObjectConverter$.convertMemberValue(MendixObjectConverter.scala:80) at com.mendix.webui.jsonserialization.MendixObjectConverter$.$anonfun$convert$1(MendixObjectConverter.scala:30) at scala.collection.MapView$MapValues.$anonfun$iterator$1(MapView.scala:119) at scala.collection.Iterator$$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$.from(Map.scala:641) at scala.collection.IterableOnceOps.toMap(IterableOnce.scala:1320) at scala.collection.IterableOnceOps.toMap$(IterableOnce.scala:1319) at scala.collection.AbstractIterable.toMap(Iterable.scala:933) at com.mendix.webui.jsonserialization.MendixObjectConverter$.convert(MendixObjectConverter.scala:30) at com.mendix.webui.jsonserialization.MendixObjectConverter$.convert(MendixObjectConverter.scala:23) 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:111) at com.mendix.webui.actions.client.RuntimeOperationAction.apply(RuntimeOperationAction.scala:67) at com.mendix.webui.actions.client.RuntimeOperationAction.apply(RuntimeOperationAction.scala:25) 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$7(ContextHandling.scala:59) at scala.runtime.java8.JFunction0$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$.monitor(ActionMonitoring.scala:52) at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:59) at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:33) at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:94) at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:30) at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:22) at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:94) at com.mendix.webui.actions.client.RegularClientAction.$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:95) at com.mendix.webui.requesthandling.ClientRequestHandler.processRequest(ClientRequestHandler.scala:68) 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$.withContextClassLoader(Runner.scala:20) at com.mendix.external.connector.MxRuntimeConnector.processRequest(MxRuntimeConnector.scala:54) at com.mendix.basis.impl.MxRuntimeImpl.processRequest(MxRuntimeImpl.scala:513) at com.mendix.m2ee.appcontainer.server.handler.RuntimeServlet.service(RuntimeServlet.scala:40) at javax.servlet.http.HttpServlet.service(HttpServlet.java:590) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764) at org.eclipse.jetty.servlet.ServletHandler$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$Chain.doFilter(ServletHandler.java:1635) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:527) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1580) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1384) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1553) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1306) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) at org.eclipse.jetty.server.Server.handle(Server.java:563) at org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598) at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287) 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$1.run(SelectableChannelEndPoint.java:53) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:199) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149) at java.base/java.lang.Thread.run(Thread.java:829)
CreateOrChangeVariable : 'Change variable TotalWattPeak'
$ProjectModules/NumberOfModules * $ProjectModules/WattagePerModule^
Left and right hand side of binary expression should not be empty
of NumberOfModules is empty or WattagePerModule is empty
What does that mean? As im quit new it might seem a silly question but im trying to fix this for the last 4 hours. Many thanks in advance Edwin.