Power BI Desktop Not Opening

[Ryan_Thungela]

When I open Power BI Desktop I recieve the following error message:

Feedback Type:
Frown (Error)

Timestamp:
2026-02-16T06:18:52.1754217Z

Local Time:
2026-02-16T08:18:52.1754217+02:00

Session ID:
4d5c728a-dc4b-460b-904e-c199c55b826a

Release:
December 2025

Product Version:
2.150.2455.0 (25.12)+3424bbf36fb23b9ec5ab7ca5a48c8bf17a7b7dd2 (x64)

Stack Trace:
Microsoft.PowerBI.Modeler.ModelingASConnectionException
at Microsoft.PowerBI.Modeler.TomExceptionExtensions.ThrowAsModelingASException(Exception ex)
at Microsoft.PowerBI.Modeling.Engine.TomServer.ExecuteAndWrapWithModelingException(Action action)
at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingTelemetryService.RunInActivity(ModelingActivityKind activity, Action action)
at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingTelemetryService.<>c__DisplayClass17_0.<RunInCertifiedReportingActivity>b__0()
at Microsoft.PowerBI.Client.Windows.Telemetry.PowerBITelemetryServiceExtensions.<>c__DisplayClass6_0.<<EmitStandardizedClientReportingEventWithDebugEvent>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.Telemetry.PowerBITelemetryServiceExtensions.<EmitStandardizedClientReportingEventWithDebugEvent>d__7`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.Telemetry.PowerBITelemetryServiceExtensions.<EmitStandardizedClientReportingEventWithDebugEvent>d__6.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.<ProcessRunInCertifiedReportingActivity>d__21.MoveNext()
--- 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.TomServer.ConnectImpl(String connectionString, ITelemetryService telemetryService)
at Microsoft.PowerBI.Client.Windows.RetryAction.Perform(Action func, Func`2 errorHandler, Int32 maxAttempts, Int32 checkIntervalMilliseconds)
at Microsoft.PowerBI.Client.Windows.AnalysisServices.AnalysisServicesService.ConnectServer(Object sender, EventArgs e)
at Microsoft.PowerBI.Client.Windows.AnalysisServices.AnalysisServicesProcess.Start()
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.Client.Windows.AnalysisServices.AnalysisServicesService.<StartProcess>d__30.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.PowerBI.Client.Windows.Utilities.AggregateExceptionHandlingExtensions.WaitAndUnpackException(Task task)
at Microsoft.PowerBI.Client.Windows.AnalysisServices.AnalysisServicesService.LoadDatabaseFromPbix(String filePath, Uri dataModelPath, DatabaseDocuments initialDocuments)
at Microsoft.PowerBI.Client.Windows.Services.LocalAnalysisServicesDatabaseCreator.<CreateAnalysisServicesDatabaseAsyncImpl>d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.PowerBI.Client.Windows.Utilities.AggregateExceptionHandlingExtensions.WaitAndUnpackException(Task task)
at Microsoft.PowerBI.Client.Windows.AnalysisServices.AnalysisServicesService.CreateEmptyDatabase(DatabaseDocuments initialDocuments)
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.AppReportFlow.<CreateEmptyDatabase>d__48.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.AppReportFlow.<EnsureEmptyDatabase>d__49.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.AppReportFlow.<OpenExistingReport>d__50.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.AppReportFlow.<ContinueLoadWithMainWindow>d__43.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.AppModule.<>c__DisplayClass4_2.<<Run>b__4>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.MainWindow.<<ActivateMainWindow>b__41_1>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":"2.150.2455.0","ModuleName":"Microsoft.PowerBI.Modeler.dll","Component":"Microsoft.PowerBI.Modeler.TomExceptionExtensions","Error":"Microsoft.PowerBI.Modeler.ModelingASConnectionException","MethodDef":"ThrowAsModelingASException","ErrorOffset":"34","ErrorCode":""}

InnerException0.Stack Trace:
at Microsoft.AnalysisServices.XmlaClient.OpenConnectionAndCheckIfSessionTokenNeeded(ConnectionInfo connectionInfo)
at Microsoft.AnalysisServices.XmlaClient.OpenConnection(ConnectionInfo connectionInfo, Boolean& isSessionTokenNeeded)
at Microsoft.AnalysisServices.XmlaClient.Connect(ConnectionInfo connectionInfo, Boolean beginSession)
at Microsoft.AnalysisServices.Core.Server.Connect(String connectionString, String sessionId, ObjectExpansion expansionType)
at Microsoft.AnalysisServices.Core.Server.Connect(String connectionString)
at Microsoft.PowerBI.Modeling.Engine.TomServer.ExecuteAndWrapWithModelingException(Action action)

InnerException1.Stack Trace:
at System.Net.Sockets.TcpClient..ctor(String hostname, Int32 port)
at Microsoft.AnalysisServices.XmlaClient.GetTcpClient(IConnectivityOwner owner, ConnectionInfo connectionInfo)

OS Version:
Microsoft Windows NT 10.0.26100.0 (x64 en-US)

CLR Version:
4.8 or later [Release Number = 533320]

Peak Virtual Memory:
86.3 GB

Private Memory:
197 MB

Peak Working Set:
317 MB

IE Version:
11.1882.26100.0

User ID:
b2ff63bb-de4d-43dd-8992-a3cfaaecee5e

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

Telemetry Enabled:
True

Enabled Preview Features:
PBI_googleBigQueryAdbcVersionEnabled
PBI_shapeMapVisualEnabled
PBI_scorecardVisual
PBI_onObject
PBI_setLabelOnExportPdf
PBI_oneDriveSave
PBI_oneDriveShare
PBI_odspSaveBackgroundUpload
PBI_modernOfficeFilePicker
PBI_useModernPublishDialogs
PBI_gitIntegration
PBI_tmdlInDataset
PBI_enhancedReportFormat
PBI_directLakeOnOneLake
PBI_advancedSlicerTypeList
PBI_textSlicer
PBI_aiNarrativesVisual
PBI_visualCalculationsAuthoring
PBI_copilotUnifiedTooling
PBI_UserInstalledVerticaODBCDriver
PBI_sqlDbNativeArtifactsOnDesktop
PBI_dataFunctionActions
PBI_enableExportQueries

Disabled Preview Features:
PBI_DatabricksAdbcVersionEnabled
PBI_snowflakeLegacyOdbcVersionEnabled
PBI_SpanishLinguisticsEnabled
PBI_qnaLiveConnect
PBI_b2bExternalDatasetSharing
PBI_publishDialogsSupportSubfolders
PBI_enhancedReportFormatPBIX
PBI_qnaImproveLsdlCopilot
PBI_customCalendars
PBI_UserInstalledNetezzaODBCDriver
MashupFlight_EnableOracleBundledOdacProviderV2
PBI_supportUDFs

Disabled DirectQuery Options:
TreatHanaAsRelationalSource

Cloud:
GlobalCloud

DPI Scale:
100%

Supported Services:
Power BI

WebView2 Runtime Version:
144.0.3719.115

WebView2 SDK Version:
1.0.2365.46

[RicardoTraNa · Accepted solution]

Hi! try a quick test. 
Run Power BI Desktop as Administrator.
If it opens, it’s almost certainly a security/permission block.

Then... if still fails even when running as Administrator, then the problem is almost certainly not user permissions ...it’s usually environment or engine startup failure in Power BI desktop

Hope that helps!

[v-aatheeque]

Hi @Ryan_Thungela 
Following up to confirm if the earlier responses addressed your query. If not, please share your questions and we’ll assist further.

[v-aatheeque]

Hi @Ryan_Thungela 

Have you had a chance to look through the responses shared earlier? If anything is still unclear, we’ll be happy to provide additional support.

[amitchandak]

@Ryan_Thungela , Make sure no Windows updates are pending. Install any pending windows update and then reinstall Power BI and try