Dos Error Level Checking
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Chen - MSFTSeptember 26, 200815 0 0 0 The command interpreter cmd.exe has a concept known as the error level, which is the exit code of the program most recently run. You can test the windows batch if errorlevel error level with the IF ERRORLEVEL command: IF ERRORLEVEL 1 ECHO error dos set errorlevel level is 1 or more
Dos Errorlevel Codes
in the same way that you can create an environment variable called FRED. But, as with FRED, that variable won't have any effect on the error level. rem this next command sets the error level to zero CMD /C EXIT 0 set ERRORLEVEL=1 if ERRORLEVEL 1 echo Does this print? The message is not printed because the ERRORLEVEL environment variable has no effect on the error level. It's just a variable whose name happens to coincide with a command processor concept. set BANKBALANCE=$1,000,000.00 "Hey, when I tried to withdraw the money, I got an insufficient funds error. What am I doing wrong?" Now, it does happen to be the case that if command extensions are enabled and you say %ERRORLEVEL%, then the command processor first looks for an environment variable called ERRORLEVEL, and if it can't find one, then it replaces %ERRORLEVEL% with the current value of the internal error level value. It's a fallback step, in the same way that your neighbor is a fallback delivery location if you aren't home. If you file a
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Dos Errorlevel 9009
the company Business Learn more about hiring developers or posting ads with us Stack Overflow dos errorlevel abfragen Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of dos errorlevel ausgeben 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up using errorlevel in a batch file to know if a program exited normally up vote 4 down vote https://blogs.msdn.microsoft.com/oldnewthing/20080926-00/?p=20743 favorite 1 We have a program that is occasionally crashing. The customer runs the program from a scheduled task. When the program is run with a certain parameter, the program runs as an interface engine, creating a file and then ftp'ing the file to another server for import by another program. I was wondering if I might have the scheduled task instead run a batch file. The batch file would run the program http://stackoverflow.com/questions/13150676/using-errorlevel-in-a-batch-file-to-know-if-a-program-exited-normally and check errorlevel as the program exits. If errorlevel is not equal to zero, then batch file would run the program again. Does anyone see problem with my plan to use errorlevel in a batch file? Here's an example of the batch file: :start myPgm.exe intfc if errorlevel <> 0 then start batch-file share|improve this question edited Mar 21 at 10:42 BartoszKP 22.3k84067 asked Oct 31 '12 at 3:01 user1787319 23113 add a comment| 2 Answers 2 active oldest votes up vote 4 down vote accepted I would write it like so: :start myPgm.exe intfc IF %errorlevel% NEQ 0 GOTO :error GOTO :end :error echo There was an error. EXIT 1 :end echo End. EXIT 0 share|improve this answer edited Feb 28 '14 at 23:23 answered Jun 12 '13 at 22:10 djangofan 11.6k32109186 Your note is OK, but your code would give a syntax error. –dbenham Feb 27 '14 at 15:38 Ok, I changed my code. –djangofan Feb 28 '14 at 22:39 No, you misunderstood. You need either if %errorlevel% neq 0 ... or if errorlevel 1 .... The last form assumes the errorlevel is never negative. Your code is neither and raises a syntax error. –dbenham Feb 28 '14 at 23:09 ok, I understand. –djangofan
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the http://stackoverflow.com/questions/4451013/check-if-process-returns-0-with-batch-file workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; dos error it only takes a minute: Sign up Check if process returns 0 with batch file up vote 15 down vote favorite 3 I want to start a process with a batch file and if it returns nonzero, do something else. I need the correct syntax for that. Something like this: ::x.bat @set RetCode=My.exe @if %retcode% is nonzero handleError.exe As dos error level a bonus, you may consider answering the following questions, please :) How to write a compound statement with if? If the application My.exe fails to start because some DLL is missing will my if work? If not, how can I detect that My.exe failed to start? windows process batch-file exit-code share|improve this question edited Mar 2 '11 at 9:32 Peter Mortensen 10.2k1369107 asked Dec 15 '10 at 14:35 Armen Tsirunyan 76.4k32215343 add a comment| 3 Answers 3 active oldest votes up vote 25 down vote accepted ERRORLEVEL will contain the return code of the last command. Sadly you can only check >= for it. Note specifically this line in the MSDN documentation for the If statement: errorlevel Number Specifies a true condition only if the previous program run by Cmd.exe returned an exit code equal to or greater than Number. So to check for 0 you need to think outside the box: IF ERRORLEVEL 1 GOTO errorHandling REM no error here, errolevel == 0 :errorHandling Or if you want to code error handling first: IF NOT ERR