The source was not found but some or all event logs could not be searched

Question

I am getting the following exception  I have given full control to Asp net account on Eventlogs in Registry edit    SecurityException  The source was not found  but some or all event logs could not be searched   Inaccessible logs  Security   System Diagnostics EventLog FindSourceRegistration String source   String machineName  Boolean readOnly  Boolean wantToCreate   664 System Diagnostics EventLog SourceExists String source  String machineName  Boolean wantToCreate   109 System Diagnostics EventLog SourceExists String source   14 Microsoft ApplicationBlocks ExceptionManagement DefaultPublisher VerifyValidSource    41   I guess this is due to some configuration issue on server

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Launch Developer command line  As an Administrator    This account has full access to Security log

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Had the same exception  In my case  I had to run Command Prompt with Administrator Rights    From the Start Menu  right click on Command Prompt  select  Run as administrator

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For me just worked iisreset  run cmd as administrator -  iisreset   Maybe somebody could give it a try

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I recently experienced the error  and none of the solutions worked for me  What resolved the error for me was adding the Application pool user to the Power Users group in computer management  I couldn t use the Administrator group due to a company policy

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Inaccessible logs  Security   A new event source needs to have a unique name across all logs including Security  which needs admin privilege when it s being read    So your app will need admin privilege to create a source  But that s probably an overkill   I wrote this powershell script to create the event source at will  Save it as   ps1 and run it with any privilege and it will elevate itself     CHECK OR RUN AS ADMIN  If  -NOT   Security Principal WindowsPrincipal  Security Principal WindowsIdentity   GetCurrent    IsInRole  Security Principal WindowsBuiltInRole   Administrator              arguments     amp        myinvocation mycommand definition           Start-Process powershell -Verb runAs -ArgumentList  arguments     Break      CHECK FOR EXISTENCE OR CREATE   source    My Service Event Source    logname    Application    if   System Diagnostics EventLog   SourceExists  source  -eq  false         System Diagnostics EventLog   CreateEventSource  source   logname       Write-Host  source -f white -nonewline  Write-Host   successfully added   -f green    else       Write-Host  source -f white -nonewline  Write-Host   already exists         DONE  Write-Host -NoNewLine  Press any key to continue       null    Host UI RawUI ReadKey  NoEcho IncludeKeyDown

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Didnt work for me   I created a new key and string value and managed to get it working  Key  HKEY LOCAL MACHINE SYSTEM CurrentControlSet services eventlog Application  lt Your app name gt   String EventMessageFile value C  Windows Microsoft NET Framework v2 0 50727 EventLogMessages dll

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EventLog SourceExists enumerates through the subkeys of HKLM SYSTEM CurrentControlSet services eventlog to see if it contains a subkey with the specified name   If the user account under which the code is running does not have read access to a subkey that it attempts to access  in your case  the Security subkey  before finding the target source  you will see an exception like the one you have described   The usual approach for handling such issues is to register event log sources at installation time  under an administrator account   then assume that they exist at runtime  allowing any resulting exception to be treated as unexpected if a target event log source does not actually exist at runtime

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For me this error was due to the command prompt  which was not running under administrator privileges  You need to right click on the command prompt and say  Run as administrator    You need administrator role to install or uninstall a service

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If you just want to sniff if a Source exists on the local machine but don t have ability to get authorization to do this  you can finger it through the following example  VB   This bypasses the security error  You could similarly modify this function to return the LogName for the Source  Public Shared Function eventLogSourceExists sSource as String  as Boolean     Try         EventLog LogNameFromSourceName sSource   quot   quot           Return True     Catch         Return False     End Try End Function

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If you are performing a new install of the SenseNet TaskManagement website on IIS  from source code  not WebPI   you will get this message  usually related to SignalR communication  As  nicole-caliniou points out  it is due to a key search in the Registry that fails    To solve this for SenseNet TaskManagement v1 1 0  first find the registry key name in the web config file  By default it is  SnTaskWeb      lt appSettings gt      lt add key  LogSourceName  value  SnTaskWeb    gt    Open the registry editor  regedit exe  and navigate to HKLM SYSTEM CurrentControlSet Services EventLog SnTask  Right-click on SnTask and select New Key  and name the key SnTaskWeb for the configuration shown above  Then right-click on the SnTaskWeb element and select New Expandable String Value  The name should be EventMessageFile and the value data should be C  Windows Microsoft NET Framework v4 0 30319 EventLogMessages dll   Keywords  signalr  sensenet  regedit  permissions

[c#] The source was not found, but some or all event logs could not be searched

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