Redirect cmd error output to file

Ok, now that we get the idea of this concept of "streams", let's play with it. Copy the following code into Notepad and save it as "test. It is said Console cannot be redirected, and I believe that's true. I can assure you I did try! In this case, we could also have used test. With the NUL device that's no problem, but when redirecting to a file one of the redirections will lock the file for the other redirection.

The result will be an empty logfile. A workaround that may look a bit intimidating is grouping the command line and escaping the redirection:. What this does is turn the part between parentheses into a "literal" uninterpreted string that is passed to the command interpreter of the newly started process, which then in turn does interpret it.

So the interpretation of the parenthesis and redirection is delayed, or deferred. A safer way to redirect START ed commands' output would be to create and run a "wrapper" batch file that handles the redirection. If an application uses buffered output, it may happen that the text of one stream is inserted in the other at a buffer boundary, which may appear in the middle of a text line.

A dedicated console output logger I. Obviously, use whatever commands you want and the output will be directed to the text file. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Redirect Windows cmd stdout and stderr to a single file Ask Question. Asked 12 years, 4 months ago. Active 2 years, 4 months ago. Viewed k times. Is it possible, or should I just redirect to two separate files? TechNet: Using command redirection operators answers this better than any of the answers here. Add a comment. Active Oldest Votes.

Abel Anders Lindahl Anders Lindahl If there is a Handle, there cannot be a space between the Handle i. Show 2 more comments. Anne DelboyJay DelboyJay 2, 1 1 gold badge 12 12 silver badges 14 14 bronze badges. However, you can see the error messages by typing output. This will open the file in your default text file viewer. As you can see, any error messages from the command are output to the error file.

All of the approaches above result in multiple files. One file is for the standard output stream and the other is for the standard error stream. If you want to include both of these outputs to the same file, you can do that too. To do this, you just need to redirect all output to the same file using the following command. Using the example above, if you only want Standard Output and no Standard Error at all, you can use the following command:. You can perform any of the same output commands above from inside a BAT file and the output from that line will go to the output file you specify.

This is a useful way to see whether any commands within a BAT file had any errors when they tried to run. Ryan has been writing how-to and other technology-based articles online since Read Ryan's Full Bio.