If not, how can I detect that My.exe failed to start? grep command with ls -a not working properly? The right way to ask for success is: if not errorlevel 1 echo success... –Aacini Jul 26 '11 at 1:31 @Aacini: well yes, but I'm checking 1 before 0, The batch file would run the program and check errorlevel as the program exits. More about the author
Bash uses the variable $? So you can include the error level in a log file: ECHO error level is %ERRORLEVEL%>logfileSo you can perform other types of tests against the error level, for example, to The question is tagged "batch", so I'm pretty sure we're looking for a batch file. It's a fallback step, in the same way that your neighbor is a fallback delivery location if you aren't home. https://blogs.msdn.microsoft.com/oldnewthing/20080926-00/?p=20743
The same goes for other dynamic environment variables like CD (current directory), DATE (current date), TIME (current time), RANDOM (random decimal number between 0 and 32767), CMDEXTVERSION (current Command Processor Extensions Help! I can't put a picture, title and author in the same page Can two different firmware files have same md5 sum? Most programs rarely document every possible return code, so I’d rather explicity check for non-zero with the NEQ 0 style than assuming return codes will be 1 or greater on error.
What does 'apt-get install update' do? 2048-like array shift Why did the One Ring betray Isildur? The statement Eduard posted will return TRUE as long as the return code is equal to or higher than the specified value. –Cody Gray Dec 15 '10 at 14:46 Can two different firmware files have same md5 sum? Dos Errorlevel Codes I also recommend documenting your possible return codes with easy to read SET statements at the top of your script file, like this: SET /A ERROR_HELP_SCREEN=1 SET /A ERROR_FILE_NOT_FOUND=2 Note that
Thanks for Noe Parenteau for this tip. Dos Set Errorlevel How could MACUSA exist in 1693 or be in Washington in 1777? Jumping to EOF in this way will exit your current script with the return code of 1. http://www.computerhope.com/forum/index.php?topic=91064.0 If quitting CMD.EXE, sets the process exit code with that number. [Brought to my attention by Maor Conforti.
Follow UsNews Holy cow, I wrote a book Basics Archives Ground Rules Suggestion Box Contact Me Disclaimers and such CategoriesCode Non-Computer Other History Tips/Support Microspeak Dream email News flash Time The Dos Errorlevel 9009 Marty says: September 27, 2008 at 11:34 am A god safety net is to reset ERRORLEVEL each time you use it, similar to the SetLAstError() function. My math students consider me a harsh grader. Not the answer you're looking for?
or if %errorlevel%==1 (... –jeb Jul 25 '11 at 6:44 @jeb: That seems to be the actual cause of the error, I mean, the mixed up syntax in the http://stackoverflow.com/questions/6812484/batch-file-test-error-level This was an issue I fought with a few months ago on an embedded system running DOS (real DOS, not CMD.EXE). Windows Batch If Errorlevel If executed from outside a batch script, it will quit CMD.EXE. Dos Display Errorlevel Unable to pass result of one command as argument to another Is it a fallacy, and if so which, to believe we are special because our existence on Earth seems improbable?
IF EXIST filename will return true if the file exists (this is not case sensitive). my review here All is not lost if you want to check the error level immediately after executing a command. ( SomeCommandThatMightGenerateAnError && (echo Success, no error) || (echo There was an error) ) Don't swim in my river, or you'll drown.Code: [Select]program.exe # program that is executed and status to be checked
IF %ERRORLEVEL% NEQ 0 (
ECHO "I failed"
EXIT My attempt For basic usage, the following seems to work ok to catch any nonzero return code: if not errorlevel 0 ( echo error level was nonzero ) windows batch-file share|improve Dos Ping Errorlevel
Very simple number line with points Is it a fallacy, and if so which, to believe we are special because our existence on Earth seems improbable? 2048-like array shift Term for SET /A ERROR_HELP_SCREEN=1 SET /A ERROR_FILE_NOT_FOUND=2 SET /A ERROR_FILE_READ_ONLY=4 SET /A ERROR_UNKNOWN=8 This gives me the flexibility to bitwise OR multiple error numbers together if I want to record numerous problems current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. http://darrenmanning.com/dos-error/dos-error-level.html I have identified and documented three classes of "dynamic" variables at stackoverflow.com/a/20169219/1012053, and within that post I reference that same Raymond Chen blog. –dbenham Jun 15 '15 at 1:47
in the "past". Dos Errorlevel Abfragen It isn’t always pretty, but, it gets the job done. 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
You can test the error level with the IF ERRORLEVEL command: IF ERRORLEVEL 1 ECHO error level is 1 or more
rem this next command sets the error level to zero CMD /C EXIT 0 set ERRORLEVEL=1 if ERRORLEVEL 1 echo Does this print? You may also want to check for specific error codes. exitCode Specifies a numeric number.If /B is specified, sets ERRORLEVEL that number.If quitting CMD.EXE, sets the process exit code with that number. http://darrenmanning.com/dos-error/dos-error-level-1.html Before posting on our computer help forum, you must register.
Do you know if another program running on the server might also set errorlevel? –user1787319 Nov 1 '12 at 14:00 @Patrick-Anderson the referenced article is vanished (error 404). A very helpful feature is the built-in DOS commands like ECHO, IF, and SET will preserve the existing value of %ERRORLEVEL%. How to work on downloaded copies of database tables in QGIS Let's do the Wave! gives loads of info on this too.
Saffron and coloration - is there a way to know why it gave the wrong color? Do you know another link to the article? –Christian Feb 27 '14 at 15:32 See blogs.msdn.com/b/oldnewthing/archive/2008/09/26/8965755.aspx for the difference between ERRORLEVEL and %ERRORLEVEL% –Patrick Anderson Feb 27 '14 at Proof of infinitely many prime numbers Speed and Velocity in German Topology and the 2016 Nobel Prize in Physics Should low frequency players anticipate in orchestra? it's amazing, I would have thought everyone would have figured out his secret by now...Guess it's limited to a small subset, eh Salmon Seems that way.
Can we say "He is accountable but not blamable" ? A very simple way to halt on error is to use the EXIT command with the /B switch (to exit the current batch script context, and not the command prompt process). Join them; 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 What do I do now?
To determine the exact return code the previous command returned, we could use a construction like this: @ECHO OFF IF ERRORLEVEL 1 SET ERRORLEV=1 IF ERRORLEVEL 2 SET ERRORLEV=2 IF ERRORLEVEL Is my teaching attitude wrong? Those have been add so now it will work correctly. –shf301 Dec 15 '10 at 15:46 This answer seems to be WRONG as the if returns true if "error