Findstr 批处理在中时不会打开

Question

Been playing around with the findstr within a batch to get an event entry within the Windows as it's older software that doesn't do this on its own accord.

Batch opens most recent log file and checks for the word failed writing to the event log if it finds it, this works if the log file is located on my desktop but not if it's the native directory in program data:

FOR /F "delims=|" %%I IN ('DIR "C:\ProgramData\**supplier**\**application**\Backup\Logs\*.txt" /B /O:D') DO SET NewestFile=%%I

FINDSTR "failed" "%NewestFile%" 
IF NOT ERRORLEVEL 1 EVENTCREATE /T WARNING /ID 963 /L APPLICATION /SO **application Backup** /D "**application** Backup failed"

pause

Thank you in advance.

Update: sorry should have mentioned I've run as admin and also ensured the file in the PD directory isn't in use. The error I get back is:

FINDSTR: Cannot open *.txt

Answer 1

Ended up being a failing with my DIR request, needed the full file path with /S arguement:

FOR /F "delims=|" %%I IN ('DIR "C:\ProgramData\**supplier**\**application**\Backup\Logs\*.txt" /B /S /O:D') DO SET NewestFile=%%I

FINDSTR "failed" "%NewestFile%" 
IF NOT ERRORLEVEL 1 EVENTCREATE /T WARNING /ID 963 /L APPLICATION /SO **application Backup** /D "**application** Backup failed"