How to capture standard error output from a Windows service?
Can you try manually redirecting stderr?
FILE* stderr_redirect = freopen( "C:/stderr.log", "w", stderr ); // Code that writes to stderr fclose( stderr_redirect );Edit:
There is no way to redirect stdout or stderr for a service other than to handle those streams inside your service yourself. Some services provide an option to redirect these messages to a file. You could either temporarily redirect these streams or add an option to your service to make it configurable next time you have a problem.
If you are modifying the code to the service, you could call SetStdHandle in your ServiceMain:
SetStdHandle(STD_ERROR_HANDLE, logFileHandle);