I0 Error 103
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What Does I/o Error 103 Mean
of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Delphi: Why do I sometimes get an I/O Error 103 with this code? up vote 10 down
I/o Error 103 Screensaver
vote favorite 4 In several of my apps I have code similar to the following: if ForceDirectories(ExtractFilePath(lLogName)) then begin AssignFile(lLog, lLogName); try if FileExists(lLogName) then Append(lLog) else Rewrite(lLog); Writeln(lLog, lLogLine); finally {$I-}CloseFile(lLog);{$I+} end; end; In one application, the first time I try to execute this I consistently get an I/O Error 103 exception on the line with the Append statement (the file does exist prior to calling this). All subsequent attempts at delphi rewrite the operation will work fine however - until I restart the app. All the docs I found about this error so far indicated that this would either be caused by calling CloseFile without prior Reset or Rewrite (Append typically isn't mentioned) or if the file was in use by another process. As the exception occurs before the call to CloseFile it obviously couldn't be the former. I already tried inserting a Reset right after the AssignFile for good measure but then I get the exception on that line. There is also no other application overtly accessing that file. I say "overtly" because I do have a slight suspicion that anti-virus (TrendMicro in my case) might be the cuplrit here (so maybe the file is in use). If that was indeed the problem, what would be the best way around it? Hard-coding an automatic retry does not really feel like a clean solution to me... Another case where I sometimes get the 103 error is this code, which I use to create an empty file (or more often to empty an existing file): AssignFile(lFile, AFileName); try Rewrite(lFile); finally CloseFile(lFile); end; In this case it's much harder to reproduce. It happens a lot less often. Most of the time this seems to happen on the
Search Advanced Search Go to Page... Thread Tools Display Modes #1 06-13-2002, 02:11 PM MrBaseball34 Senior Member Join Date: Jan 2001 Posts: 7,260 Prevent I/O Error 103 Not used to Std. I/O operations... When using i/o error 103 windows xp AssignFile and CloseFile, I am sometimes getting a 103 error (File is not open). How can i/o error 32 I check to see if, in fact, the file is open before the CloseFile call? MrBaseball34 View Public Profile Visit MrBaseball34's homepage! Find all posts by MrBaseball34 #2 06-13-2002, 02:37 PM vandub Member Join Date: Aug 2001 Posts: 44 RE: Prevent I/O Error 103 you could use the {$i-} command then check the ioresult for an error AssignFile(F, http://stackoverflow.com/questions/634587/delphi-why-do-i-sometimes-get-an-i-o-error-103-with-this-code FileName); {$I-} Reset(F); {$I+} if IOResult = 0 then MessageDlg('File size in bytes: ' + IntToStr(FileSize(F)), mtInformation, [mbOk], 0) else MessageDlg('File access error', mtWarning, [mbOk], 0); vandub View Public Profile Send a private message to vandub Visit vandub's homepage! Find all posts by vandub #3 06-13-2002, 02:37 PM HTML Senior Member Join Date: Jan 2001 Posts: 2,977 RE: Prevent I/O Error 103 Hello, This site has many examples on File I/O and uses http://www.delphipages.com/forum/showthread.php?t=58954 IoResult(should return 0 if successfull) in few places in the snippets. http://homepages.borland.com/efg2lab/Library/Delphi/IO/FileIO.htm If perhaps you can post a snippet of your code that you think cuases the problem , that would help. :-) HTML View Public Profile Send a private message to HTML Visit HTML's homepage! Find all posts by HTML #4 06-13-2002, 10:35 PM PoseFant Senior Member Join Date: Jan 2001 Posts: 1,002 RE: Prevent I/O Error 103 you could use the {$i-} command then check the ioresult for an error AssignFile(F, FileName); {$I-} Reset(F); {$I+} if IOResult = 0 then MessageDlg('File size in bytes: ' + IntToStr(FileSize(F)), mtInformation, [mbOk], 0) else MessageDlg('File access error', mtWarning, [mbOk], 0); --- Regards /Filip I've lost my autosignature ... *sobbing* ... PoseFant View Public Profile Send a private message to PoseFant Visit PoseFant's homepage! Find all posts by PoseFant #5 06-14-2002, 05:34 AM MrBaseball34 Senior Member Join Date: Jan 2001 Posts: 7,260 RE: Prevent I/O Error 103 Hey, Filip, did you just simply copy vandub's post verbatim? Anyway... I want to know how to determine if the file is open before I call FileClose. If I use Reset, what will happen to the file if it IS open? MrBaseball34 View Public Profile Visit MrBaseball34's homepage! Find all posts by MrBaseball34 #6 06-14-2002, 10:23 AM HTML Senior Member Join Date: Jan 20
mode that the operating system is attempting to use for the operation may not be recognized. The I/O error may be experienced with various media storage devices such as: external hard drives, DVD or CDs, DVD or CD drives, http://www.tech-faq.com/io-device-error.html SD cards, or USB sticks/drives. Common causes of the error include faulty hardware, a loose connection between the hardware and computer, outdated hardware drivers, or the IDE channel properties require modification. What Are the Common I/O Device Error Messages? Unfortunately, http://www.techsupportforum.com/forums/f10/i-0-error-103-on-new-build-588253.html the I/O device error can generated more than one error message. Some of the most commonly encountered messages associated with the error include: - The request could not be performed because of an I/O device error - Only part error 103 of a readprocessmemory request was completed - Only part of a writeprocessmemory request was completed Windows may display a “Windows error code” along with the plain language error message. The I/O device error codes that are associated with the error include: error 6, error 21, error 103, error 105, and error 131. Why Does the I/O Device Error Occur? There are a number of potential causes for I/O device errors on computers that run the Windows Operating System (OS). i/o error 103 These include: - Outdated or corrupt driver installation for the affected hardware device. - Windows using an incompatible transfer mode for the hardware. - Faulty or loose connection with the hardware. - The portable media (CD, DVD, or SD card) is damaged or excessively dirty. Basic I/O Device Error Troubleshooting Before throwing away a “faulty” CD/DVD, or delving into more complex troubleshooting, there are some basic steps computer users can attempt to clear the I/O device error. If the steps do not solve the issue, they may help pinpoint what is causing the error to be thrown and save time in fixing the issue. Step 1 – Restart the computer that is throwing the I/O device error. Step 2 – Attempt to access the disk, drive, or portable media again. Step 3 – If the error is still being thrown, try to access the disk on another computer (if available). This will help identify if the error is with the drive, IDE channel, or media (disk) itself. Step 4 – If the disk/media opens on the alternative computer, there is an issue with the primary PC (drive, IDE, or connection). If it does not, there could be a problem with the media itself or IDE channel. If you do not have another computer available and the error is being thrown when attempting to read a CD/DVD or SD card, insert a different disk or card into the respectiv
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