Dos Command Error Codes
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Dos Command Exit Code
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only takes a minute: Sign up easy way to see dos command return code up vote 21 down vote favorite 5 Sometimes I run a command in cmd such as: fc /b file1 file2 and would like to see the dos beep codes return code from fc. Is there a simple way to do this? windows cmd dos return-code share|improve this question asked Mar 26 '10 at 8:07 Warpin 3,48473764 add a comment| 1 Answer 1 active oldest votes up vote 42 down vote accepted echo %ERRORLEVEL% From TechNet, Command shell overview: "%ERRORLEVEL% ... Returns the error code of the most recently used command. A non zero value usually indicates an error." To test for specific error levels in batch files, you may find dos batch return code this knowledgebase article useful. share|improve this answer answered Mar 26 '10 at 8:16 Andras Vass 9,4162341 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged windows cmd dos return-code or ask your own question. asked 6 years ago viewed 34425 times active 6 years ago Related 643How to pass command line parameters to a batch file?264Is there a command to refresh environment variables from the command prompt in Windows?6What is the Windows/cmd.exe equivalent of Linux/bash's $? — the program exit/return code?1327Is there an equivalent of 'which' on the Windows command line?467How do I get the application exit code from a Windows command line?1Windows batch file commands and variables1How can I communicate with Command Prompt (CMD) using C++?371How to run two commands in one line in Windows CMD?0DOS Batch Command Timer1“EXIT” in batch file cannot overwrite return code of previous commands Hot Network Questions How do hackers find the IP address of devices? What would happen if I created an account called 'root' My math students consider me a harsh grader. Is my teaching attitude wrong? If I'm traveling at the same dire
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task. Batch file decisions may be made based on what code was generated. This webpage gives a short discussion of these codes and ways in which they might be used. Deep http://www.chebucto.ns.ca/~ak621/DOS/ExitCode.html detail will not be gone into. If you want to know more, see your DOS manual and/or the On-Screen Help. Be aware that not everything presented here may work as shown for the commands included with the version or manufacturer of DOS you have. INFORMATION BELOW MAY NOT BE REPRODUCED WITHOUT PERMISSION FROM THE AUTHOR © What are Exit Codes? When DOS or its software finishes a command operation, it usually generates a code error codes upon exiting. When it gives that exit code, it is essentially saying: Here are the results of my work. Since these are generated after a command has finished and exited, they are known as "Exit Codes". These codes are hidden from the user but may be tested for via various methods. The codes give the computer system an idea of what happened during an operation or after it has completed. One code might signal that dos command error the task ended with no errors, or that it ended with no errors but that the operation was not successful. If an error did occur, a code might be generated depending on what the error was. Why Might I Want to Use Exit Codes? Since these codes can indicate what happened during a computer operation, they can be used in a batch file to tailor the direction of further procedures. So as an example, if one used the "FC" (File Compare) command and the outcome was that two files matched, a further procedure could be that the batch file be directed to delete one of the duplicate files. Another example of this is given farther on. (See this website's Batch File Tutorial for information on writing batch files.) What do Exit Codes Look Like? Each is one of 256 available values represented by a number from 0 (zero) through 255. `0' typically represents an operation that was completed with no errors. Other numbers might represent problems or various results. Note that not all available numbers will typically be used by a program. In fact, I know of only a few commands or programs that do use all numbers. In addition, there are also those that are programmed to generate random, meaningless numbers upon completion. They only generate one of these at a time but