Had a script silently fail because of a negative result. –devstuff Sep 16 '10 at 4:37 Careful: the enabledelayedexpansion is CRITICAL and also required for an if/else or any I just tried and it didn't see to work. –ConfusedNoob Jan 3 '13 at 22:39 @ConfusedNoob I do all the time... How can I avoid this? This page describes some debugging techniques that will help you find and correct the issues. have a peek here
A successful command returns a 0 while an unsuccessful one returns a non-zero value that usually can be interpreted as an Error Code. Looks familiar? Not the answer you're looking for? i.e. %windir%\system32 Now, if your batch file assumes that you launched it through Explorer or from an existing command prompt with the current working directory set to its own location, http://stackoverflow.com/questions/1164049/batch-files-error-handling
Specifically, in the bat I have this line 7za a back_%date:~10,4%-%date:~7,2%-%date:~4,2%_%time:~0,2%.%time:~3,2%.%time:~6,2%.zip back Which backup the
Linked 0 Error handling in batch script 14 Foolproof way to check for nonzero (error) return code in windows batch file 0 capturing error message from echo in cmd prompt 1 Just a block of code is not very helpful. –PoweredByOrange Sep 5 '13 at 23:48 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign Jumping to EOF in this way will exit your current script with the return code of 1. Batch File On Error Goto Why does typography ruin the user experience?
Windows NT4 and later: In NT4 use either COLOR00 or VERIFYOTHER2>NUL to set an errorlevel 1. Batch File Error Handling Tutorial For example, create this .cmd file: @echo off echo Starting very complicated batch file... Why was Vader surprised that Obi-Wan's body disappeared? http://steve-jansen.github.io/guides/windows-batch-scripting/part-3-return-codes.html yourCommand && ( someCommandThatMayFail (call ) ) || ( echo This can only fire if yourCommand raises an error ) See Foolproof way to check for nonzero (error) return code in
Note: Environment variables are a set of dynamic named values that can affect the way, running processes will behave on a computer. Batch File Continue On Error 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 The date string looks to be good, but clearly the string is getting terminated too early - you specify you want a .zip file, but end up with teh default .7z Advisor professor asks for my dissertation research source-code Achieve same random number sequence on different OS with same seed How much more than my mortgage should I charge for rent?
in the "past". read review Follow the procedure to find error message sources described above. Return Error Code From Batch File How do I make it terminate immediately if one of the calls returns an error code of any level? Windows Batch Errorlevel Output a googol copies of a string Player claims their wizard character knows everything (from books).
that helped Reply Follow UsPopular Tagsvirtualization hyper-v service pack network dump performance remote desktop services debug hotfix Win8 ldr script setup gdr scvmm branch print spool WS2012 W8 Archives March 2013(1) In DOS for the rest of us, we can use FOR loops to determine the errorlevel: @ECHO OFF REM Reset variables FOR %%A IN (1 10 100) DO SET ERR%%A= REM ping -invalid-arg || goto :error echo OH noes, this shouldn't have succeeded. Check This Out You'd want to look at a more powerful scripting language.
But since the DOS command to determine the return code is IF ERRORLEVEL, most people use the name errorlevel. Batch Set Errorlevel some_program.exe 2>&1 | FIND "error message here" && (ECHO ERROR & EXIT /b) some_program.exe 2>&1 | FIND "Done processing." || (ECHO ERROR & EXIT /b) share|improve this answer edited Nov 26 will execute next cmd until succeeds –iTake Nov 11 '13 at 17:21 This makes long scripts unreadable, is there no other way? –jan Oct 10 '14 at 7:53
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 Start checking the highest errorlevel that can be expected, then check for the one below, etcetera: IF ERRORLEVEL 255 GOTO Label255
IF ERRORLEVEL 254 GOTO Label254
If executed from outside a batch script, it will quit CMD.EXE. Advisor professor asks for my dissertation research source-code aligning shapes in latex Does a long flight on a jet provide a headstart to altitude acclimatisation? Also how can i change this script so it zips files that are older than 7 days? this contact form current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list.
If quitting CMD.EXE, sets the process exit code with that number. [Brought to my attention by Maor Conforti. sample file name: back_2012-10-22_15.11.57.zip When the task was triggered by the set time, the backup file was somehow weird sample file name: back_2012-10-24_.7z Then since the compressed file name was not brought me an idea how to implement several retries: cmd || cmd || ... This technique is demonstrated in my iDate sample.
Basically if any thing goes wrong I want to stop and print out what went wrong. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the neq 0 exit /b !errorlevel! ) Edit: You have to check the error after each command. Environment variables A common source of errors are empty environment variables, or other unexpected values.
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 You'll need something more like: setlocal enabledelayedexpansion for %%f in (C:\Windows\*) do ( same-executable-over-and-over.exe /with different "parameters" if !errorlevel! Can it be done? 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).
A very helpful feature is the built-in DOS commands like ECHO, IF, and SET will preserve the existing value of %ERRORLEVEL%. You may also want to check for specific error codes. Is the "token" value or position as expected?