I've been having difficulty with this feature, which is a bummer because I've been so excited to use it. I've successfully connected small data models published to the service. However, whenever I try to connect a larger data model >~200 mb I get this error, except for on 550mb model with only 9 tables. When I hit cancel it pops up again and again and I need to close the program from task manager. All of the models are import only and are hosted/accessed with a pro license.

Below is a copy of the report when I select 'Report this issue'

Feedback Type:
Frown (Error)

Timestamp:
2020-12-17T02:25:03.7471645Z

Local Time:
2020-12-16T21:25:03.7471645-05:00

Session ID:
3d361669-bfb6-41ee-a337-7d929976c0fc

Release:
December 2020

Product Version:
2.88.621.0 (20.12) (x64)

Stack Trace:
at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source)
at Microsoft.PowerBI.Modeling.Engine.DataModel.Utilities.DataModelExtensions.GetLastKnownQueryName(IQueryableObject obj, Boolean isV3FeatureSwitchEnabled)
at Microsoft.PowerBI.Modeling.Engine.DataModel.Utilities.DataModelExtensions.GetLinkedQuery(IQueryableObject obj, TwoWayDictionary`2 queryOriginalNameToRuntimeIdMap, ModelingMashupDocument mashupDocument, Boolean isV3FeatureSwitchEnabled)
at Microsoft.PowerBI.Modeling.Engine.Loader.QueryStalenessEvaluator.<GetQueryableModelItemsWithoutQuery>d__5.MoveNext()
at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source)
at Microsoft.PowerBI.Modeling.Engine.Loader.QueryStalenessEvaluator.GetStalenessReason(ModelingMashupDocument mashupDocument, IModelingSession modelingSession, IModelingQueryServices modelingQueryServices, IDataModel dataModel, Boolean isModelV3Enabled, Boolean isV3FeatureSwitchEnabled, Boolean includePendingUpgrades, Dictionary`2& queryIdToStalenessReasonMap)
at Microsoft.PowerBI.Client.Windows.PowerBIQueryStalenessEvaluator.IsLoadRequired(Report report, Boolean includePendingUpgrades)
at Microsoft.PowerBI.Client.Windows.Services.ReportFactory.CreatePowerBIPackageFromReport(Report report, DataModelSaveMode abfSaveState, Queries overrideQueries, IReadOnlyDictionary`2 parameterExpressionsToUpdate, Boolean packageWillHaveLabel)
at Microsoft.PowerBI.Client.Windows.Services.PowerBIPackagingService.Save(Report report, FileStream fileStream, DataModelSaveMode dataModelSaveMode, Queries overrideQueries, IReadOnlyDictionary`2 parameterExpressionsToUpdate)
at Microsoft.PowerBI.Client.Windows.Services.AutoRecoveryManager.<>c__DisplayClass82_1.<PerformAutoSave>b__3()
at Microsoft.PowerBI.Client.Windows.Services.AutoRecoveryManager.<>c__DisplayClass85_0.<TryIOActionAndLogException>b__0()
at Microsoft.PowerBI.Client.Windows.Services.AutoRecoveryManager.TryIOActionAndLogException[T](Func`1 action, String description)
at Microsoft.PowerBI.Client.Windows.Services.AutoRecoveryManager.<>c__DisplayClass82_0.<<PerformAutoSave>b__1>d.MoveNext()

PowerBINonFatalError:
{"AppName":"PBIDesktop","AppVersion":"2.88.621.0","ModuleName":"Microsoft.PowerBI.Modeling.Engine.dll","Component":"Microsoft.PowerBI.Modeling.Engine.DataModel.Utilities.DataModelExtensions","Error":"System.InvalidOperationException","MethodDef":"GetLastKnownQueryName - PowerBIPackager.Save","ErrorOffset":"92"}

OS Version:
Microsoft Windows NT 10.0.18362.0 (x64 en-US)

CLR Version:
4.7 or later [Release Number = 528040]

Peak Virtual Memory:
39.2 GB

Private Memory:
745 MB

Peak Working Set:
897 MB

IE Version:
11.1139.18362.0

User ID:
d3d15e6c-c879-408e-bc45-d21c1a816328

Workbook Package Info:
1* - en-US, Query Groups: 0, fastCombine: Disabled, runBackgroundAnalysis: True.

Telemetry Enabled:
True

Model Default Mode:
DirectQuery

Model Version:
PowerBI_V3

Is Report V3 Models Enabled:
True

Enabled Preview Features:
PBI_shapeMapVisualEnabled
PBI_NewWebTableInference
PBI_v3ModelsPreview
PBI_dataPointLassoSelect
PBI_compositeModelsOverAS
PBI_narrativeTextBox
PBI_newFieldList
PBI_cartesianMultiplesAuthoring

Disabled Preview Features:
PBI_SpanishLinguisticsEnabled
PBI_JsonTableInference
PBI_ImportTextByExample
PBI_ExcelTableInference
PBI_qnaLiveConnect
PBI_eimInformationProtectionForDesktop
PBI_azureMapVisual
PBI_dynamicParameters
PBI_anomalyDetection

Disabled DirectQuery Options:
TreatHanaAsRelationalSource

Cloud:
GlobalCloud

DPI Scale:
125%

Supported Services:
Power BI

As I'm testing more I just encountered another error message:

This was after I had live connected to a model on the service and was converting over to bring the model into the file when connecting to another data source.

Feedback Type:
Frown (Error)

Timestamp:
2020-12-17T02:47:33.4852072Z

Local Time:
2020-12-16T21:47:33.4852072-05:00

Session ID:
afb01825-2553-4afc-9255-6bfa94d8b141

Release:
December 2020

Product Version:
2.88.621.0 (20.12) (x64)

Stack Trace:
   at System.ThrowHelper.ThrowKeyNotFoundException()
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at Microsoft.PowerBI.Client.Windows.Modeling.RelationshipLoader.TableInputRelationshipVisitor..ctor(Report report, IDataModel dataModel, IEnumerable`1 tableInputs, HashSet`1 existingTableInputs, List`1 tableInputsToProcess)
   at Microsoft.PowerBI.Client.Windows.Modeling.RelationshipLoader.TryImportRelationships(CancellationToken cancellationToken, IEnumerable`1 tableInputs, IDataModel dataModel, HashSet`1 existingTableInputs, IReadOnlyDictionary`2 dqResourceInfoMap, TableInputToQueryMap tableInputToQueryMap)
   at Microsoft.PowerBI.Client.Windows.Modeling.RelationshipLoader.TryDetectAndImportRelationships(IExtendedModelChangeScope modelChangeScope, CancellationToken cancellationToken, IEnumerable`1 tableInputs, List`1 newTableColumnPairs, HashSet`1 existingTableInputs, TableInputToQueryMap tableInputToQueryMap)
   at Microsoft.PowerBI.Modeling.Engine.Loader.PowerQueryToModelLoader.CreateRelationships(IRelationshipLoader relationshipLoader, IExtendedModelChangeScope modelChangeScope, List`1 newTableColumnPairs, HashSet`1 existingTableInputs)
   at Microsoft.PowerBI.Modeling.Engine.Loader.PowerQueryToModelLoader.ProcessLoadInputs(IRelationshipLoader relationshipLoader, IExtendedModelChangeScope modelChangeScope, Action`1 beforeSchemaSyncCallback, Action`1 afterSchemaSyncCallback)
   at Microsoft.PowerBI.Modeling.Engine.Loader.PowerQueryToModelLoader.<>c__DisplayClass19_0.<PerformLoadInternal>b__0(IExtendedModelChangeScope modelChangeScope)
   at Microsoft.PowerBI.Modeling.Engine.Authoring.AsyncModelAuthoringService.<>c__DisplayClass14_0.<RunExtendedModelChangeAsync>b__0()
   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.PowerBI.Modeling.Common.TaskExtensions.WaitAndUnpackException(Task task)
   at Microsoft.PowerBI.Modeling.Engine.Loader.PowerQueryToModelLoader.PerformLoadInternal(IRelationshipLoader relationshipLoader, IModelAuthoringChangeScopeProvider authoringChangeScopeProvider, IModelingQueryServices queryServices, Action`1 beforeSchemaSyncCallback, Action`1 afterSchemaSyncCallback, IRefreshPolicyUpdater refreshPolicyUpdater, Boolean skipImpactAnalysisWarning)
   at Microsoft.PowerBI.Modeling.Engine.Loader.PowerQueryToModelLoader.<>c__DisplayClass18_0.<PerformLoadAsync>b__1()
   at System.Threading.Tasks.Task`1.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingTelemetryService.<>c__DisplayClass8_0`1.<<RunInAsyncActivity>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingTelemetryService.<RunInAsyncActivity>d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingTelemetryService.<RunInAsyncActivity>d__8`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Modeling.Engine.Loader.LoadToReportFlow.<PerformLoadToAnalysisServices>d__37.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Modeling.Engine.Loader.LoadToReportFlow.<ExecuteInternal>d__32.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Modeling.Engine.Loader.LoadToReportFlow.<Execute>d__31.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Modeling.Engine.ModelingEngine.<LoadModelAsyncInternal>d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingTelemetryService.<>c__DisplayClass8_0`1.<<RunInAsyncActivity>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingTelemetryService.<RunInAsyncActivity>d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingTelemetryService.<RunInAsyncActivity>d__8`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingService.<LoadToModel>d__16.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Client.Windows.FloatingDialog.KoLoadToReportDialog.<>c__DisplayClass35_0.<<StartLoadToReportFlow>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Client.Windows.IExceptionHandlerExtensions.<HandleAwaitableAsyncExceptions>d__1.MoveNext()

PowerBINonFatalError:
{"AppName":"PBIDesktop","AppVersion":"2.88.621.0","ModuleName":"Microsoft.PowerBI.Client.Windows.dll","Component":"Microsoft.PowerBI.Client.Windows.Modeling.RelationshipLoader+TableInputRelationshipVisitor","Error":"System.Collections.Generic.KeyNotFoundException","MethodDef":".ctor","ErrorOffset":"194"}

OS Version:
Microsoft Windows NT 10.0.18362.0 (x64 en-US)

CLR Version:
4.7 or later [Release Number = 528040]

Peak Virtual Memory:
38.1 GB

Private Memory:
457 MB

Peak Working Set:
672 MB

IE Version:
11.1139.18362.0

User ID:
d3d15e6c-c879-408e-bc45-d21c1a816328

Workbook Package Info:
1* - en-US, Query Groups: 0, fastCombine: Disabled, runBackgroundAnalysis: True.

Telemetry Enabled:
True

AS Live Connection:
True

Enabled Preview Features:
PBI_shapeMapVisualEnabled
PBI_NewWebTableInference
PBI_v3ModelsPreview
PBI_dataPointLassoSelect
PBI_compositeModelsOverAS
PBI_narrativeTextBox
PBI_newFieldList
PBI_cartesianMultiplesAuthoring

Disabled Preview Features:
PBI_SpanishLinguisticsEnabled
PBI_JsonTableInference
PBI_ImportTextByExample
PBI_ExcelTableInference
PBI_qnaLiveConnect
PBI_eimInformationProtectionForDesktop
PBI_azureMapVisual
PBI_dynamicParameters
PBI_anomalyDetection

Disabled DirectQuery Options:
TreatHanaAsRelationalSource

Cloud:
GlobalCloud

DPI Scale:
125%

Supported Services:
Power BI

Happy to provide additional detials.

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