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Dos Errorlevel Codes


billrich Guest Re: DOS IF %ERRORLEVEL% construct « Reply #4 on: September 02, 2009, 09:29:06 AM » Quote from: Salmon Trout on September 02, 2009, 09:00:08 AMCode: [Select]
IF %ERRORLEVEL% NEQ That worked for me :) –Timotei Jul 16 '12 at 18:56 2 nice catch. WaitForSingleObject( pi.hProcess, INFINITE ); int result = -1; if(!GetExitCodeProcess(pi.hProcess,(LPDWORD)&result)) { printf("GetExitCodeProcess() failed (%d)\n", GetLastError() ); } else printf("The exit code for '%ws' is %d\n",(LPTSTR)(strCmd.GetString()), result ); // Close process and thread This blog entry by Batcheero explains perfectly why you should never SET the ERRORLEVEL variable. navigate here

What About Exit Codes in DOS Software, as Mentioned Previously? As you can see, using a program's exit codes allows batch files to make intelligent decisions to automatically direct a given program or do additional tasks based on a program's outcome. Peruse the documentation that comes with each program to see if exit codes are given. billrich Guest Re: DOS IF %ERRORLEVEL% construct « Reply #9 on: September 02, 2009, 12:49:43 PM » Thank you Mr. http://stanislavs.org/helppc/dos_error_codes.html

Batch File Return Code

Thus, "IF ERRORLEVEL 2 GOTO PROBLEM" means that if the exit code is number `2' (at a level of `2'), the batch file is to branch to the "PROBLEM" section. Here's a specific example: ::NATION.bat :: @ECHO OFF :FIND FIND "Canada" NATION.TXT IF ERRORLEVEL 2 GOTO PROBLEM IF ERRORLEVEL 1 GOTO END IF ERRORLEVEL 0 GOTO PRINT :PROBLEM ECHO A Problem One might interpret the line "IF ERRORLEVEL 3 GOTO DATABASE" as "If Choice Number 3 is selected, go to the `DATABASE' label and follow the instructions below it." After ending the Note that not all available numbers will typically be used by a program.

This documentation is archived and is not being maintained. Requirements Minimum supported client Windows XP [desktop apps only] Minimum supported server Windows Server 2003 [desktop apps only] Header WinError.h (include Windows.h) See also System Error Codes     Show: Inherited Protected Print Do Programs other than DOS Commands Give Exit Codes? Errorlevel 9009 Sure.

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 If Not Errorlevel 0 CHOICE /C:123<- /N > NUL IF ERRORLEVEL 4 GOTO END IF ERRORLEVEL 3 GOTO DATABASE IF ERRORLEVEL 2 GOTO SPREADSHEET IF ERRORLEVEL 1 GOTO WORD-PROCESSOR GOTO END :WORD-PROCESSOR (start word processor So "NATION.TXT" would always be printed no matter what. A very helpful feature is the built-in DOS commands like ECHO, IF, and SET will preserve the existing value of %ERRORLEVEL%.

I thought my ponderous prose style and choleric disposition would give me away to all, but it seems I have been lucky. Set Errorlevel To 0 It is not being presented here as it might potentially add confusion to this discussion.) Could You Give Another Example? The safest way to use errorlevels for all DOS versions is the reverse order check. You may also want to check for specific error codes.

If Not Errorlevel 0

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. http://www.febooti.com/products/automation-workshop/online-help/events/run-dos-cmd-command/exit-codes/ Head, Shoulders, Knees and Toes, Knees and Toes Why is nuclear waste more dangerous than the original nuclear fuel? Batch File Return Code Besides finding out just what happened during a command or program's execution, one may use these codes to allow a batch file to make decisions. Echo Errorlevel A small Kix "one liner" can be used too: EXIT $ErrLev If called by a batch like this: KIX32 ERRORLEVEL.KIX $ErrLev=23 it will return an errorlevel 23 (ERRORLEVEL.KIX would be the

Too bad DOS doesn’t support constant values like Unix/Linux shells. check over here So "errorlevel 0" will match everything. Trying start /wait didn't work. Can morse code be called steganography? 5 Favorite Letters Why can't linear bounded automata accept an empty string? Set Errorlevel

up vote 480 down vote favorite 97 I am running a program and want to see what its return code is (since it returns different codes based on different errors). This means most of the time we only need to check IF ERRORLEVEL 1 ... Aren't Exit Codes also Called Something Else? his comment is here It's because the batch file has already displayed choices in the form of a menu via the ECHO lines.

Checking Return Codes In Your Script Commands The environmental variable %ERRORLEVEL% contains the return code of the last executed program or script. Exit /b Errorlevel Sometimes the code is returned by a function deep in the stack and far removed from your code that is handling the error. 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

Move the echo and exit to an else branch. –Samuel Mar 9 '15 at 23:27 Good point.

Guides Guide to Windows Batch Scripting Recent Posts Parsing Jenkins secrets in a shell script Jenkins Job to export Rackspace Cloud DNS Domain As BIND Zone Files Troubleshooting GitHub WebHooks SSL Start checking the highest errorlevel that can be expected, then check for the one below, etcetera: IF ERRORLEVEL 255 GOTO Label255

Windows 2000 and later: In Windows 2000 & XP a new /B switch has been added to the EXIT command, enabling the batch file to quit with a return code: EXIT Indicates that the application has been terminated either by user's keyboard input CTRL+C or CTRL+Break or closing command prompt window.3221225794
-1073741502The application failed to initialize properly. That comes from the fact that when a command or program exits, it returns a value in the form of a number. weblink You can see in the example that the tests for these levels are done in descending order.

Skip to Main Content Search Help Tips Dictionary History Forums Contact You are here: Help > MS-DOS MS-DOS extended errors DEC HEX Description 00 00h No error 01 01h Function number Instead, you can use "if %ERRORLEVEL% EQU 0 (..)". –Curtis Yallop Jul 29 '14 at 16:06 Found cases where %ERRORLEVEL% is 0 even though an error occurred. should be simple but I am using [email protected] %ERRORLEVEL% NEQ 1 GOTO [email protected] %ERRORLEVEL% EQ 0 GOTO OK:ERRORECHO "Program failed, please check this log file for errors ..." GOTO END:OKmynestprogram.exe:ENDand it Hi, I'm Steve.

To expand further, let's use the FIND example shown here earlier. Before posting on our computer help forum, you must register. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Why would you exit on error level 0? –AlikElzin-kilaka Feb 14 '15 at 8:56 Good answer, but 0 is the good case.

share|improve this answer answered Feb 28 '15 at 19:33 jonretting 36415 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign Unity JS to C# conversion - Incomplete list of public variables in Inspector Authoritative source that <> and != are identical in performance in SQL Server Hard data on students' reasons Conversely, if the file did not contain the string, a different operation might be done. windows cmd dos return-code share|improve this question asked Mar 26 '10 at 8:07 Warpin 3,50473864 add a comment| 1 Answer 1 active oldest votes up vote 42 down vote accepted echo

Thanks very much! –The Mask May 28 '14 at 0:56 1 Another reason why it might not work (always zero) is when it's inside an if or for. They are returned by the GetLastError function when many functions fail. Indicates that the application has been launched on a Desktop to which current user has no access rights. Use of these codes requires some amount of investigation and analysis.

I did not know about that command. In addition, there are also those that are programmed to generate random, meaningless numbers upon completion. For What Purposes Can Exit Codes be Used? The System Error Codes are very broad.

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