Oracle connection error

this the error:

Feedback Type:
Frown (Error)

Error Message:
Object reference not set to an instance of an object.

Stack Trace:
System.NullReferenceException
at Microsoft.PowerBI.Client.Windows.PowerBIQueryStalenessEvaluator.IsLoadRequired(Report report, Boolean includePendingUpgrades)
at Microsoft.PowerBI.Client.Windows.Services.WarningDetectionService.DetectReportLoadWarning()
at Microsoft.PowerBI.Client.Windows.Services.WarningDetectionService.<ScheduleAsyncDetection>b__40_1()
at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)

Stack Trace Message:
Object reference not set to an instance of an object.

Invocation Stack Trace:
at Microsoft.Mashup.Host.Document.ExceptionExtensions.GetCurrentInvocationStackTrace()
at Microsoft.Mashup.Client.UI.Shared.StackTraceInfo..ctor(String exceptionStackTrace, String invocationStackTrace, String exceptionMessage)
at Microsoft.PowerBI.Client.Windows.Telemetry.PowerBIUserFeedbackServices.GetStackTraceInfo(Exception e)
at Microsoft.PowerBI.Client.Windows.Telemetry.PowerBIUserFeedbackServices.ReportException(IWindowHandle activeWindow, IUIHost uiHost, FeedbackPackageInfo feedbackPackageInfo, Exception e, Boolean useGDICapture)
at Microsoft.Mashup.Client.UI.Shared.UnexpectedExceptionHandler.<>c__DisplayClass14_0.<HandleException>b__0()
at Microsoft.Mashup.Host.Document.SynchronizationContextExtensions.<>c__DisplayClass2_0.<SendAndMarshalExceptions>b__0(Object null)
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
at System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate method, Object[] args, Boolean synchronous)
at System.Windows.Forms.Control.Invoke(Delegate method, Object[] args)
at System.Windows.Forms.WindowsFormsSynchronizationContext.Send(SendOrPostCallback d, Object state)
at Microsoft.Mashup.Host.Document.SynchronizationContextExtensions.SendAndMarshalExceptions(SynchronizationContext context, Action callback)
at Microsoft.Mashup.Client.UI.Shared.UnexpectedExceptionHandler.HandleException(Exception e)
at Microsoft.PowerBI.Client.PowerBIUnexpectedExceptionHandler.HandleException(Exception e)
at Microsoft.PowerBI.Client.Windows.Utilities.PowerBIFormUnexpectedExceptionHandler.HandleException(Exception e)
at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
at System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate method, Object[] args, Boolean synchronous)
at System.Windows.Forms.Control.Invoke(Delegate method, Object[] args)
at System.Windows.Forms.WindowsFormsSynchronizationContext.Send(SendOrPostCallback d, Object state)
at Microsoft.Mashup.Host.Document.SynchronizationContextExtensions.SendAndMarshalExceptions(SynchronizationContext context, Action callback)
at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)
at Microsoft.PowerBI.Client.Windows.Services.EventAggregationService.Publish[TEvent,TEventArg](TEventArg eventArgs)
at Microsoft.PowerBI.Client.Telemetry.PowerBITelemetryManager.UpdateTelemetryConfiguration(PowerBITelemetryConfiguration newConfiguration, String callerName)
at Microsoft.PowerBI.Client.Telemetry.PowerBITelemetryManager.OnTracingEnabledChanged()
at Microsoft.PowerBI.Client.Windows.PowerBIApplicationTracingHost.set_TracingEnabled(Boolean value)
at Microsoft.PowerBI.Client.Telemetry.PowerBITelemetryManager.Dispose()
at Microsoft.PowerBI.Client.Program.RunApplication(String[] args)
at Microsoft.PowerBI.Client.Program.Main(String[] args)

PowerBINonFatalError:
{"AppName":"PBIDesktop","AppVersion":"2.124.1805.0","ModuleName":"Microsoft.PowerBI.Client.Windows.dll","Component":"Microsoft.PowerBI.Client.Windows.PowerBIQueryStalenessEvaluator","Error":"System.NullReferenceException","MethodDef":"IsLoadRequired","ErrorOffset":"0","ErrorCode":""}

PowerBIUserFeedbackServices_IsReported:
True

Hi issadaas ,
Based on the information you have provided, you can troubleshoot the error by following the steps below:

1. Verify that the Oracle client is properly installed on your system.The Oracle client should be compatible with the version of Power BI Desktop being used.
2. Ensure that the user account running Power BI Desktop has the required permissions to access the Oracle database.
3. Try connecting to the Oracle database using Power BI Desktop on another computer to see if the problem is specific to the current setup.

I also recommend you to read this article which might be helpful in solving your problem:

Solved: Issues connecting Oracle to Power BI - Microsoft Fabric Community

Best Regards,

Ada Wang

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