Delphi I/o Error 103
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I O Error 103 Pic C Compiler
do I sometimes get an I/O Error 103 with this code? up vote 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 windows 7 I/O Error 103 exception on the line with the Append statement (the file does exist prior to calling this). All 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, w
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What Does I/o Error 103 Mean
implementation, technical Similarly to [this], the multithreading in a project has also caused the strange error, which is IO Error 103.
I/o Error 103 Screensaver
It does not happen every time but 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, http://stackoverflow.com/questions/634587/delphi-why-do-i-sometimes-get-an-i-o-error-103-with-this-code the following function will return the size of a 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 https://helloacm.com/delphi-io-error-103/ byte; begin Result := -1; if (FileExists(fn)) then begin try AssignFile(f, fn); Reset(f); 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) t
f: TextFile;) The Line with Rewrite crashes with I/O Error 103: ERROR_TOO_MANY_SEM_REQUESTS (The semaphore cannot be set again.) 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 http://www.delphigroups.info/2/6d/479235.html 103 I/O Error are not the same as Win32 Errors. This is Run Time Error as http://docwiki.embarcadero.com/RADStudio/Seattle/en/Input-Output_Errors named in old Borland Pascal. The number 103 means File Not Open, but it is not predicted to apear 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"
state. (If the application does not include the System.SysUtils unit, the exception causes the application to terminate). Handling I/O Errors In the {$I-} state, the program continues to execute, and the error is reported by the IOResult function. I/O Error List The following table lists all I/O errors, numbers, and descriptions. Number Name Description 100 Disk read error Reported by Read on a typed file if you attempt to read past the end of the file. 101 Disk write error Reported by CloseFile, Write, WriteIn, or Flush if the disk becomes full. 102 File not assigned Reported by Reset, Rewrite, Append, Rename, or Erase if the file variable has not been assigned a name through a call to Assign or AssignFile. 103 File not open Reported by CloseFile, Read Write, Seek, Eof, FilePos, FileSize, Flush, BlockRead, or BlockWrite if the file is not open. 104 File not open for input Reported by Read, Readln, Eof, Eoln, SeekEof, or SeekEoln on a text file if the file is not open for input. 105 File not open for output Reported by Write or Writeln on a text file if you do not generate a Console application. 106 Invalid numeric format Reported by Read or Readln if a numeric value read from a text file does not conform to the proper numeric format. See Also Exception Handling Resolving Internal Errors (Delphi) Delphi Runtime Errors Fatal errors Operating system errors Retrieved from "http://docwiki.embarcadero.com/RADStudio/Seattle/e/index.php?title=Input-Output_Errors&oldid=227166" Category: RAD Studio ReferenceHidden category: AMMigrate Views Page Discussion View source History Personal tools Create account Log in Search RAD Studio Seattle Seattle Examples and Samples Seattle Libraries Main Page - Seattle Topics Wiki What's New Tutorials FireMonkey Application Platform Multi-Device Applications Getting Started Steps in Developing a Project Key Application Types FireDAC Windows Developer's Guide Modeling Tools IDE Reference and Utilities Delphi Reference C++ Reference Subject Index HTML5 Builder Newer Versions Berlin Topics Previous Versions XE8 Topics XE7 Topics XE6 T