It seems that Table.IsEmpty has error

[aminakov]

I reported this issue via Power BI Desktop.

The issue is that if I use Table.IsEmpty(), I have the error. But I cannot see any problem with the table itself. I can see all it's rows in PQ viewer, I can do Table.RowCount, I can do any other operation with the table, but cannot do Table.IsEmpty.

This info was copied from Error UI in PBID:

Feedback Type:
Frown (Error)

Timestamp:
2019-12-05T09:30:43.0683780Z

Local Time:
2019-12-05T12:30:43.0683780+03:00

Session ID:
66d33255-3a59-45b4-9f55-88cf3a96d25f

Release:
November 2019

Product Version:
2.75.5649.861 (19.11) (x64)

Stack Trace:
Microsoft.Mashup.Evaluator.Interface.ErrorException: Session guid 7e2fe081-8eb7-4810-8daf-5eb041a32b82 not found ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: Session guid 7e2fe081-8eb7-4810-8daf-5eb041a32b82 not found ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: Session guid 7e2fe081-8eb7-4810-8daf-5eb041a32b82 not found ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: Session guid 7e2fe081-8eb7-4810-8daf-5eb041a32b82 not found ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: Session guid 7e2fe081-8eb7-4810-8daf-5eb041a32b82 not found ---> System.ArgumentException: Session guid 7e2fe081-8eb7-4810-8daf-5eb041a32b82 not found ---> System.ArgumentException: Session guid 7e2fe081-8eb7-4810-8daf-5eb041a32b82 not found
   at Microsoft.DataIntegration.FuzzyMatching.FuzzyLookupEntry.FinishJoin(Guid sessionGuid)
   at Microsoft.Mashup.Engine1.Library.FuzzyMatching.FuzzyMatcher.NonStreamingFuzzyMatcher.FinishNestedJoin(Guid sessionId)
   at Microsoft.Mashup.Engine1.Library.FuzzyMatching.IndexFuzzyNestedJoinAlgorithm.IndexFuzzyNestedJoinEnumerator.Dispose()
   at Microsoft.Mashup.Engine1.Runtime.ListValue.get_IsEmpty()
   at Microsoft.Mashup.Engine1.Language.LanguageLibrary.List.IsEmptyFunctionValue.TypedInvoke(ListValue list)
   at Microsoft.Mashup.Engine1.Runtime.NativeFunctionValue1`2.Invoke(Value arg0)
   at Microsoft.Mashup.Engine1.Language.MembersFunctionValue1.Invoke(Value arg0)
   at Microsoft.Mashup.Engine1.Language.FunctionInvocationInstruction2.Execute(MembersFrame1& frame)
   at Microsoft.Mashup.Engine1.Language.MembersFunctionValue1.Invoke(Value arg0)
   at Microsoft.Mashup.Engine1.Language.DebugInstruction.Execute(MembersFrame1& frame)
   at Microsoft.Mashup.Engine1.Language.FunctionInvocationInstruction2.Execute(MembersFrame1& frame)
   at Microsoft.Mashup.Engine1.Language.DebugInstruction.Execute(MembersFrame1& frame)
   at Microsoft.Mashup.Engine1.Language.InstructionInvocationInstruction2.Execute(MembersFrame1& frame)
   at Microsoft.Mashup.Engine1.Language.DebugInstruction.Execute(MembersFrame1& frame)
   at Microsoft.Mashup.Engine1.Language.MembersFunctionValue1.Invoke(Value arg0)
   at Microsoft.Mashup.Engine1.Language.RecordInstruction.RuntimeRecordValue.Force(Int32 index)
   at Microsoft.Mashup.Engine1.Language.RecordInstruction.RuntimeRecordValue.get_Item(Int32 index)
   at Microsoft.Mashup.Engine1.Language.MembersFunctionValue1.Invoke(Value arg0)
   at Microsoft.Mashup.Engine1.Language.RecordInstruction.RuntimeRecordValue.Force(Int32 index)
   at Microsoft.Mashup.Engine1.Language.RecordInstruction.RuntimeRecordValue.get_Item(Int32 index)
   at Microsoft.Mashup.Engine1.Runtime.Library.Linker.BindFunctionValue.TypedInvoke(RecordValue environment, Value section, TextValue name)
   at Microsoft.Mashup.Engine1.Runtime.NativeFunctionValue3`4.Invoke(Value arg0, Value arg1, Value arg2)
   at Microsoft.Mashup.Engine1.Language.MembersFunctionValue0.Invoke()
   at Microsoft.Mashup.Engine1.Language.ListInstruction.RuntimeListValue.Force(Int32 index)
   at Microsoft.Mashup.Engine1.Language.ListInstruction.RuntimeListValue.get_Item(Int32 index)
   at Microsoft.Mashup.Engine1.Language.MembersFunctionValue1.Invoke(Value arg0)
   at Microsoft.Mashup.Engine1.Language.RecordInstruction.RuntimeRecordValue.Force(Int32 index)
   at Microsoft.Mashup.Engine1.Language.RecordInstruction.RuntimeRecordValue.get_Item(Int32 index)
   at Microsoft.Mashup.Engine1.Language.FunctionInvocationInstruction2.Execute(MembersFrame1& frame)
   at Microsoft.Mashup.Engine1.Language.Instruction.ExecuteCondition(MembersFrame1& frame)
   at Microsoft.Mashup.Engine1.Language.DebugInstruction.ExecuteCondition(MembersFrame1& frame)
   at Microsoft.Mashup.Engine1.Language.IfInstruction.Execute(MembersFrame1& frame)
   at Microsoft.Mashup.Engine1.Language.DebugInstruction.Execute(MembersFrame1& frame)
   at Microsoft.Mashup.Engine1.Language.MembersFunctionValue1.Invoke(Value arg0)
   at Microsoft.Mashup.Engine1.Language.RecordInstruction.RuntimeRecordValue.Force(Int32 index)
   at Microsoft.Mashup.Engine1.Language.RecordInstruction.RuntimeRecordValue.get_Item(Int32 index)
   at Microsoft.Mashup.Engine1.Language.MembersFunctionValue0.Invoke()
   at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.BeginGetResult(DocumentEvaluationParameters parameters, Action`1 callback)
   --- End of inner exception stack trace ---
   at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.BeginGetResult(DocumentEvaluationParameters parameters, Action`1 callback)
   at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.BeginGetResult(DocumentEvaluationParameters parameters, Action`1 callback)
   at Microsoft.Mashup.Evaluator.Interface.IDocumentEvaluatorExtensions.GetResult[T](IDocumentEvaluator`1 evaluator, DocumentEvaluationParameters parameters)
   at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetResult[T](IMessageChannel channel, BeginGetResultMessage message, Action`1 action)
   at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetPreviewValueSource(IMessageChannel channel, BeginGetPreviewValueSourceMessage message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.OnMessageWithUnknownChannel(IMessageChannel baseChannel, MessageWithUnknownChannel messageWithUnknownChannel)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.EvaluationHost.Run()
   at Microsoft.Mashup.Container.EvaluationContainerMain.Run(Object args)
   at Microsoft.Mashup.Evaluator.SafeThread2.<>c__DisplayClass9_0.<CreateAction>b__0(Object o)
   at Microsoft.Mashup.Container.EvaluationContainerMain.SafeRun(String[] args)
   at Microsoft.Mashup.Container.EvaluationContainerMain.Main(String[] args)
   --- End of inner exception stack trace ---
   at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.<>c__DisplayClass3_0.<BeginGetResult>b__0(EvaluationResult2`1 result)
   --- End of inner exception stack trace ---
   at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.<>c__DisplayClass3_0.<BeginGetResult>b__0(EvaluationResult2`1 result)
   at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.BeginGetResult(DocumentEvaluationParameters parameters, Action`1 callback)
   at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.BeginGetResult(DocumentEvaluationParameters parameters, Action`1 callback)
   at Microsoft.Mashup.Evaluator.Interface.IDocumentEvaluatorExtensions.GetResult[T](IDocumentEvaluator`1 evaluator, DocumentEvaluationParameters parameters)
   at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetResult[T](IMessageChannel channel, BeginGetResultMessage message, Action`1 action)
   at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetPreviewValueSource(IMessageChannel channel, BeginGetPreviewValueSourceMessage message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.OnMessageWithUnknownChannel(IMessageChannel baseChannel, MessageWithUnknownChannel messageWithUnknownChannel)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.EvaluationHost.Run()
   at Microsoft.Mashup.Container.EvaluationContainerMain.Run(Object args)
   at Microsoft.Mashup.Evaluator.SafeThread2.<>c__DisplayClass9_0.<CreateAction>b__0(Object o)
   at Microsoft.Mashup.Container.EvaluationContainerMain.SafeRun(String[] args)
   at Microsoft.Mashup.Container.EvaluationContainerMain.Main(String[] args)
   --- End of inner exception stack trace ---
   at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.<>c__DisplayClass9_1.<OnBeginGetPreviewValueSource>b__1()
   at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.<>c__DisplayClass0_0.<RunStub>b__0()
   at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Action action)
   --- End of inner exception stack trace ---
   at Microsoft.Mashup.Evaluator.EvaluationHost.<>c__DisplayClass11_0.<TryReportException>b__1()
   at Microsoft.Mashup.Common.SafeExceptions.IgnoreSafeExceptions(IEngineHost host, IHostTrace trace, Action action)
   at Microsoft.Mashup.Evaluator.EvaluationHost.TryReportException(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Exception exception)
   at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Action action)
   at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.RunStub(IEngineHost engineHost, IMessageChannel channel, Func`1 getPreviewValueSource)
   at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.<>c__DisplayClass12_1`1.<OnBeginGetResult>b__0()
   at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Action action)
   at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetResult[T](IMessageChannel channel, BeginGetResultMessage message, Action`1 action)
   at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetPreviewValueSource(IMessageChannel channel, BeginGetPreviewValueSourceMessage message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.OnMessageWithUnknownChannel(IMessageChannel baseChannel, MessageWithUnknownChannel messageWithUnknownChannel)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.EvaluationHost.Run()
   at Microsoft.Mashup.Container.EvaluationContainerMain.Run(Object args)
   at Microsoft.Mashup.Evaluator.SafeThread2.<>c__DisplayClass9_0.<CreateAction>b__0(Object o)
   at Microsoft.Mashup.Container.EvaluationContainerMain.SafeRun(String[] args)
   at Microsoft.Mashup.Container.EvaluationContainerMain.Main(String[] args)
   --- End of inner exception stack trace ---
   at Microsoft.Mashup.Evaluator.EvaluationHost.OnException(IEngineHost engineHost, IMessageChannel channel, ExceptionMessage message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.Interface.IMessageChannelExtensions.WaitFor[T](IMessageChannel channel)
   at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.PreviewValueSource.WaitFor(Func`1 condition, Boolean disposing)
   at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.PreviewValueSource.get_TableSource()
   at Microsoft.Mashup.Evaluator.Interface.TracingPreviewValueSource.get_TableSource()
   at Microsoft.Mashup.Host.Document.Analysis.PackageDocumentAnalysisInfo.PackagePartitionAnalysisInfo.SetPreviewValue(EvaluationResult2`1 result, Func`1 getStaleSince, Func`1 getSampled)

OS Version:
Microsoft Windows NT 10.0.17763.0 (x64 ru-RU)

CLR Version:
4.7 or later [Release Number = 461814]

Peak Virtual Memory:
48.1 GB

Private Memory:
6.2 GB

Peak Working Set:
8.06 GB

IE Version:
11.864.17763.0

User ID:
51188473-b45a-41de-8361-6197908954fd

Workbook Package Info:
1* - ru-RU, Query Groups: 44, fastCombine: Enabled, runBackgroundAnalysis: False.

Telemetry Enabled:
True

Snapshot Trace Logs:
C:\Users\a.minakov\AppData\Local\Microsoft\Power BI Desktop\FrownSnapShot332481733.zip

Model Default Mode:
Empty

Enabled Preview Features:
PBI_QueryDiagnostics
PBI_showMinervaRibbon
PBI_showMinervaViewNavigator

Disabled Preview Features:
PBI_shapeMapVisualEnabled
PBI_SpanishLinguisticsEnabled
PBI_NewWebTableInference
PBI_showIncrementalRefreshPolicy
PBI_qnaLiveConnect
PQ_AIInsightsFunctionBrowser
PBI_realTimeRefresh
PBI_userFavoriteResourcePackagesEnabled
PBI_personalVisualizationPaneEnabled
PBI_decompositionTree

Disabled DirectQuery Options:
TreatHanaAsRelationalSource

Cloud:
GlobalCloud

DPI Scale:
100%

Supported Services:
Power BI

[v-qiuyu-msft]

Hi @aminakov, 

Based on my test with Power BI desktop version 2.75.5649.961 64-bit (November 2019), the Table.IsEmpty() function does work. Please update your Power BI desktop to the same version as ours then test again. 

Best Regards,
Qiuyun Yu