Good luck ;-) I appreciate what you say about not having changed anything.
Unfortunately, the very nature of AVs can make them difficult to debug/track down, and also sometimes difficult to reproduce repeatedly (i.e. it is actually possible that there has always been a problem with a particular piece of code - whether yours or a component you're using - but that some set of circumstances just caused it to rear its ugly head today) I'd be interested to see the actual code in the method you quoted, although it's quite often the case with AVs that the cause of the problem is some distance from where the effects are felt. Often the best protection against AVs is discipline when creating/freeing objects, and maybe using a memory profiling tool to check on tidyness of object creation/destruction... HTH, Conor P.S. Phew, that took a bit of effort - one fingered typing due to a broken arm is tiring ;-) Thank goodness for StickyKeys... -----Original Message----- From: Chris Veale [mailto:[EMAIL PROTECTED]] Sent: Wednesday, 25 September 2002 10:57 a.m. To: Multiple recipients of list delphi Subject: RE: [DUG]: what does this error mean? I have done a little more research in this and the code is fine till I reach the end of the procedure Im executing procedure TForm1.F1Book1ObjValueChanged(Sender: TObject; var ObjName: WideString; ObjID: Integer); var .. begin .. end;{TForm1.F1Book1ObjValueChanged} *****************>this is the line that when it executes causes the application error now this code worked yesterday, and I didnt change anything overnight it just stopped working, that is why Im at a little bit of a loss. I havent tried rebooting yet, just restarting delphi, the reboot happens now to see if that fixes the problem, and if not then a delphi reinstall.... Thanks for the advice tho Conor Chris Veale > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On > Behalf Of Conor Boyd > Sent: Wednesday, 25 September 2002 10:44 a.m. > To: Multiple recipients of list delphi > Subject: RE: [DUG]: what does this error mean? > > > Hi Chris, > > Tell me if I'm teaching you to suck eggs, but it's quite easy > to get AVs in > your code by e.g. referring to an object that doesn't exist > any more etc. > > Even though the error message lists a Windows DLL (user32), > this doesn't > mean that it's not a bit of your code causing the AV. > > E.g., if you have two variables referring to the same object, and you > destroy the object using one of the variables, you would > still be able to > call methods on the other variable, but you would be likely > to get an AV, > 'cos the memory that the object resided at has been reclaimed > by the OS. > > If it's not a problem with your code, it might be a bug in > the component > you're using. > > Again, I might have missed the point of your original email, > but I hope this > helps... > > Cheers, > > Conor > > -----Original Message----- > > From: "Chris Veale" <[EMAIL PROTECTED]> > > To: "Multiple recipients of list delphi" <[EMAIL PROTECTED]> > > Sent: Wednesday, September 25, 2002 9:45 AM > > Subject: [DUG]: what does this error mean? > > > > > > > Hi. > > > > > > I am looping through some sheets in the f1book component, > > and after I > > > complete the looping I get this error > > > > > > "Exception EAccessViolation in module user32.dll at 000047CF > > > Access Violation at address 77E147CF in module > > 'user32.dll'. Read of > > > Address 00000000." > > > > > > Can anyone tell me what this means, and preferably how to fix it? > > > > > > I have tried stepping through the code, and it all seems to > > be working ok, > > > though it dies on me. > > > > > > Please help if you can. > > > > > > Chris Veale > -------------------------------------------------------------- > ------------- > New Zealand Delphi Users group - Delphi List - > [EMAIL PROTECTED] > Website: http://www.delphi.org.nz > To UnSub, send email to: [EMAIL PROTECTED] > with body of "unsubscribe delphi" > Web Archive at: http://www.mail-archive.com/delphi%40delphi.org.nz/ > --- > Incoming mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.391 / Virus Database: 222 - Release Date: 19/09/02 > --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). 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