I O Error 32 Delphi 7
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of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Delphi multi-threading file write: I/O error 32 up vote 0 down vote favorite I created a class for writing thread-safe log in a text file using CriticalSection. I am not an expert of CriticalSection exception einouterror in module file access denied and multi-threading programming (...and Delphi), I'm definitely doing something wrong... unit ErrorLog; interface uses Winapi.Windows, System.SysUtils; type TErrorLog = class private FTextFile : TextFile; FLock : TRTLCriticalSection; public constructor Create(const aLogFilename:string); destructor Destroy; override; procedure Write(const ErrorText: string); end; implementation constructor TErrorLog.Create(const aLogFilename:string); begin inherited Create; InitializeCriticalSection(FLock); AssignFile(FTextFile, aLogFilename); if FileExists(aLogFilename) then Append(FTextFile) else Rewrite(FTextFile); end; destructor TErrorLog.Destroy; const fmTextOpenWrite = 55218; begin EnterCriticalSection(FLock); try if TTextRec(FTextFile).Mode <> fmTextOpenWrite then CloseFile(FTextFile); inherited Destroy; finally LeaveCriticalSection(FLock); DeleteCriticalSection(FLock); end; end; procedure TErrorLog.Write(const ErrorText: string); begin EnterCriticalSection(FLock); try WriteLn(FTextFile, ErrorText); finally LeaveCriticalSection(FLock); end; end; end. to test the class I created a form with a timer set to 100 milliseconds: procedure TForm1.Timer1Timer(Sender: TObject); var I : integer; aErrorLog : TErrorLog; begin aErrorLog := nil; for I := 0 to 1000 do begin try aErrorLog := TErrorLog.Create(FormatDateTime('ddmmyyyy', Now) + '.txt'); aErrorLog.Write('new line'); finally if Assigned(aErrorLog) then FreeAndNil(aErrorLog); end; end; end; the logs are written, but occasionally raise I/O Error 32 exception on Clo
Rewrite(MyOutFile); Now it gives me an "I/O error 32" (with the file existing or delphi assignfile not). What is error 32? Where does Delphi hide its error code deciphering? What could be wrong? Thanks Danny Schoemann Dan...@dorotree.com Team Delphi Developer Fri, 19 Apr 2002 03:00:00 GMT Re:What is I/O error 32? In message <7vkfh5$4...@forums.borland.com>, Danny Schoemann stated: Quote> Now it gives me an "I/O error 32" (with the file existing or not). > http://stackoverflow.com/questions/27202975/delphi-multi-threading-file-write-i-o-error-32 What is error 32? 32 is a standard Windows error code indicating a sharing violation. You'll find the Windows error codes declared in Windows.Pas in the form ERROR_... -- Regards Ralph (TeamB) -- Danny Schoeman Delphi Developer Sun, 21 Apr 2002 03:00:00 GMT Re:What is I/O error 32? Thanks Ralph. Your pointers helped us fix the problem. For the http://www.delphigroups.info/2/a7/334575.html record, here's the story: After digging around the Windows.pas files and all other .pas files containing the word "sharing" I discovered that error code 32 is a generic code for any "undefined" I/O error. ( To quote commdlg.pas: "Note: Undefined return values map to OFN_SHAREWARN, but are reserved for future use.") By stepping and guessing we traced it to a line in a previous function "RmDir(MyDirName)" that failed. Since we were not trapping IO errors with IOResult then all subsequent IO failed (as per help file - - "If an I/O error occurs and I/O-checking is off, all subsequent I/O operations are ignored until a call is made to IOResult. Calling IOResult clears the internal error flag".) Only RmDir causes this and not RemoveDir. So we are now using RemoveDir. Most of the time (all the time?) RemoveDir (and RmDir) fail. Not serious but peculiar. Thanks again - Danny Schoemann http://www.dorotree.com QuoteRalph Friedman (TeamB) wrote in message ... >In message <7vkfh5$4...@forums.borland.com>, Danny Schoemann stated: >> Now it gives me an "I/O e
for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Ask a Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Expand Search Submit Close Search Login Join https://www.experts-exchange.com/questions/20344045/I-O-error-32-when-manipulating-files.html Today Products BackProducts Gigs Live Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > I/O error 32 when manipulating files Want to Advertise Here? Solved I/O error 32 when manipulating files Posted on 2002-08-28 Delphi http://www.nldelphi.com/showthread.php?13521-I-O-error-32 1 Verified Solution 5 Comments 3,140 Views Last Modified: 2010-04-04 hi, when I did the coding to manipulate the file, i also met I/O error, the problem occurs when hitting the following command: Rewrite(tempfile); I am using windows o error 2000 and Delphi 6.0. Please tell me what happens and how to solve this problem!!! Thanks 0 Question by:cdbdelphi Facebook Twitter LinkedIn Google Best Solution bymaio The error is a sharing violation, which can mean that your or another program has this files opened. For a
visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 9 of 9 Thread: I/O error 32 Thread Tools Show Printable Version Subscribe to this Thread… Search Thread Advanced Search Rate This Thread Current Rating Excellent Good Average Bad Terrible Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 16-Mar-04,12:27 #1 Pino View Profile View Forum Posts View Blog Entries View Articles Super Spits Join Date Feb 2004 Location Heerlen Posts 338 I/O error 32 ik krijg een I/O error 32 als ik een bestandje wil herschrijven hier de code: Code: procedure TfLogin.N121Click(Sender: TObject); begin if taal = 'Nederlands' then veranderTaal('English') else veranderTaal('Nederlands'); showmessage(haaltekst(11)); FormCreate(self); end; procedure TfLogin.veranderTaal(t:string); const filenaam:string='MTA.mta'; var f:textfile; begin taal := t; AssignFile(f, filenaam); rewrite(f); <---------------Hier komt de foutmelding writeln(f, t); closefile(f); end; I'm back! Reply With Quote 16-Mar-04,12:41 #2 JMB View Profile View Forum Posts View Blog Entries View Articles TJmb Join Date Jan 2004 Posts 52 IO error 32 is een zgn sharing violation. Heb je zelf (of iemand anders via b.v. een netwerk) de file reeds ergens anders geopend? Reply With Quote 16-Mar-04,12:44 #3 Pino View Profile View Forum Posts View Blog Entries View Articles Super Spits Join Date Feb 2004 Location Heerlen Posts 338 ik heb hem niet open en ook niemand via het netwerk, maar misschien zit er nog ergens in het programma een fout I'm back! Reply With Quote 16-Mar-04,13:09 #4 Cornelis View Profile View Forum Posts View Blog Entries View Articles Ex-Student Join Date Feb 2004 Location Leeuwarden Posts 2,409 Zet voor de Assign File(), CLose(f); en probeer het dan nog eens. (misschien dat je de file ergens anders in de code hebt ingeladen en dat je hem daar bent vergeten te closen. PS: Misschien staat de file ook op read-only??? Reply With Quote 16-Mar-04,13:22 #5 Pino View Profile View Forum Posts View Blog Entries View Art