How to capture stderr on Windows/DOS?

Question

I want to capture the errors from a script into a file instead of to the screen.

In *nix, this is done with stderr redirection, usually

echo "Error" 2> errorfile.log

How do I do it in a CMD script under Windows?

score 45 · Accepted Answer · edited May 23 '17 at 11:54

45

For example:

PSKILL NOTEPAD >output.txt 2>&1

This will direct stdout and stderr to a file name output.txt.

See Underused features of Windows batch files for more details.

edited May 23 '17 at 11:54

Community

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answered Jan 27 '09 at 12:49

aphoria

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If you want them redirected to separate files, you can do `mycommand >stdout.txt 2>stderr.txt` – Kip Oct 24 '12 at 16:15

score 20 · Answer 2 · answered Jan 27 '09 at 08:50

20

That should work in Win32, too.

If you have already redirected stdout, and want stderr redirected to the same file, you must use the 2>& special form, rather than just specifying the same file twice. Otherwise you'll get a "file busy" error.

answered Jan 27 '09 at 08:50

unwind

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This is also covered in *[Redirect stdout and stderr to a single file](http://stackoverflow.com/questions/1420965)*. – Peter Mortensen Oct 09 '15 at 20:50

How to capture stderr on Windows/DOS?

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