Delphi 7 I/o Error 103
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I O Error 103 Windows 7
Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a i o error 103 pic c compiler community 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
I/o Error 103 Realterm
10 down 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 what does i/o error 103 mean subsequent attempts at 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 tim
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I/0 Error 103
Error 103 July 28, 2012 No Comments delphi, I/O File, implementation, technical Similarly to [this],
I/o Error 103 Screensaver
the multithreading in a project has also caused the strange error, which is IO Error 103. It does not happen every time but rewrite delphi randomly. I googled a bit and found this poston stackoverflow.And I started to look into the Delphi code which has the File opening functions using Reset, AssignFile etc. Before, the following function will return the size of a http://stackoverflow.com/questions/634587/delphi-why-do-i-sometimes-get-an-i-o-error-103-with-this-code given file.function getFileSizeInBytes(const fn: string): integer; var f: File of byte; begin Result := -1; if (FileExists(fn)) then begin try AssignFile(f, fn); Reset(f); Result := FileSize(f); finally CloseFile(f); end; end; end;function getFileSizeInBytes(const fn: string): integer; var f: File of byte; begin Result := -1; if (FileExists(fn)) then begin try AssignFile(f, fn); Reset(f); https://helloacm.com/delphi-io-error-103/ Result := FileSize(f); finally CloseFile(f); end; end; end;The problem occurred most readily when one logging operation swiftly followed another. The second operation would fail for the above reason. To solve the IO 103 error, using the IO directive {$I-} to suppress the exceptions and {$I+} to turn it on. The variable IOResult indicates that the IO operation is successful if it is zero. For example, the above code could be improved using the IOResult.function getFileSizeInBytes(const fn: string): integer; var f: File of byte; begin Result := -1; if (FileExists(fn)) then begin try {$I-} AssignFile(f, fn); Reset(f); {$I+} if (IOResult = 0) then begin Result := FileSize(f); end else begin Result := 0; end; finally CloseFile(f); end; end; end;function getFileSizeInBytes(const fn: string): integer; var f: File of byte; begin Result := -1; if (FileExists(fn)) then begin try {$I-} AssignFile(f, fn); Reset(f); {$I+} if (IOResult = 0) then begin Result := FileSize(f); end else begin Result := 0; end; finally CloseFile(f); end; end; end;The function returns zero if there is an exception in reseting
f: TextFile;) The Line with Rewrite crashes with I/O Error 103: ERROR_TOO_MANY_SEM_REQUESTS (The semaphore cannot be set again.) http://www.delphigroups.info/2/6d/479235.html What does that mean?? What is wrong? Thanks, Philipp Adam Fli Delphi Developer Wed, 26 May 2004 00:14:06 GMT Re:I/O Error 103 I/O Error are not the same https://forum.4programmers.net/Delphi_Pascal/78838-IO_error_103 as Win32 Errors. This is Run Time Error as named in old Borland Pascal. The number 103 means File Not Open, but it is not predicted to apear error 103 on rewrite function. Please check if it is on this function. I belive that file is not created correctly and so it is not opened. You may send more code too, that i can se what can be wrong. Adam Quote"Philipp Crocoll"
Assembler Algorytmy (X)HTML CSS Forum Newbie Delphi/Pascal C/C++ C# i .NET Java Python PHP Webmastering Inne języki programowania Bazy danych Algorytmy i struktury danych Inżynieria oprogramowania Nietuzinkowe tematy Edukacja Kariera Szkolenia i konferencje Magazyn Programista Off-Topic Oceny i recenzje Hardware/Software Społeczność Perełki Projekty Forumowe Flame Ogłoszenia drobne Coyote Test Pastebin Mikroblogi Czat Praca 4programmers.net » Forum » Delphi i Pascal » I/O error 103 I/O error 103 Odpowiedz Nowy wątek lsd100 2005-09-28 18:20 Rejestracja: 2005-09-22 22:36 Ostatnio: 2012-07-14 14:16 Sciagnalem z jakiejs strony przykladowy program na socketach do przesyłania plików. Mam Delphi 7e. Ja mam łacze radiowe a mój znajomy neostrade i podczas testow gdy ja wysylalem z clienta plik do niego ktory mial np.400KB to u niego sciagnelo tylko z 8KB i wyskakiwał błąśI/O error 103. NIe wiemo co chodzi.Gdy sprawdzalem klienta i serwera u siebi ena kompie (127..0.0.1) wszystko bylo ok.A w sieci juz lipa. ZAmieszczam kod Clienta i Serwera : KLIENT -------------------------------------------------- Unit Unit1; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, ComCtrls, StdCtrls, ScktComp; type TForm1 = class(TForm) Label1: TLabel; GroupBox1: TGroupBox; Edit1: TEdit; Button1: TButton; GroupBox2: TGroupBox; stat: TStatusBar; od: TOpenDialog; Label2: TLabel; filename: TLabel; Button3: TButton; Button2: TButton; prog: TProgressBar; cmdsock: TClientSocket; filesock: TClientSocket; procedure Button3Click(Sender: TObject); procedure Button1Click(Sender: TObject); procedure cmdsockConnect(Sender: TObject; Socket: TCustomWinSocket); procedure cmdsockError(Sender: TObject; Socket: TCustomWinSocket; ErrorEvent: TErrorEvent; var ErrorCode: Integer); procedure cmdsockDisconnect(Sender: TObject; Socket: TCustomWinSocket); procedure Button2Click(Sender: TObject); private { Private declarations } public { Public declarations } end; var Form1: TForm1; implementation {$R