"Unable to start profiling. The system cannot find the file specified" error occurs if attach to Windows Service process
Symptoms:
When you attach the profiler to the process, it shows the message "Preparing the profiler..." for about 1 minute and then fails with the error:
"Unable to start profiling. The system cannot find the file specified".
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Possible cause:
CLR doesn't start the "attach" thread for the application.
To resolve the issue:
1) Open regedit.exe
2) Find HKLM\SYSTEM\CurrentControlSet\Services\<YourServiceName>
3) Add new multi-string value (REG_MULTI_SZ) with "Environment" name
4) Add value COMPlus_AttachThreadAlwaysOn=1 , then press Enter to get empty new line
5) Click OK
6) Restart your service
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Those are my symptoms, but I'm attaching to a service, I am attaching to a .NET 4 Framework app. This is a new PC and worked on my previous one, so I'm assuming it's a configuration error.
Kevin
What kind of application do you try to attach to? Is it standalone application, IIS or probably something else?
Anyway, could you please try to set
COMPlus_AttachThreadAlwaysOn=1 variable for your application and check if this issue occurs after it?You can do it e.g. from command line (for standalone application):
- Run cmd
- Execute "set COMPlus_AttachThreadAlwaysOn=1" without quotes
- Run your application from this command line