Home > Access Violation > Raised Exception Class Eaccessviolation With Message Access Violation

Raised Exception Class Eaccessviolation With Message Access Violation

Contents

in frmMap (mainform) should i have it like this: type TfrmMap = class(TForm) TfrmIdentify = class(TForm) var frmMap: TfrmMap; frmIdentify : TfrmIdentify again please excuse all of my stupid questions helenchu Thanks for the pointer that put me on track! andyho View Public Profile Visit andyho's homepage! When I restart the tool the RS232 communication works again, but always stops after the same number of bytes have been sent and received. check over here

Thanks a bunch if recs.Count > 0 then begin try DataModule1.ADOQuery1.Close; DataModule1.ADOQuery1.SQL.Clear; field := recs.Fields.Item(recs.TableDesc.FieldName[4]); for i := 0 to recs.Count -1 do begin strNum[i] := field.ValueAsString; DataModule1.ADOQuery1.SQL.Add('select * from myView Have you looked at the call stack in the debugger when the AV occurs? Form2.Edit1.Text:='Доступ получен';Добавлено через 37 секунд Точка это оператор доступа !!! @Lord_Voodoo Супер-модератор 8505 / 2172 / 61 Регистрация: 07.03.2007 Сообщений: 10,844 Завершенные тесты: 1 20.09.2010, 11:34 Project Project1.exe User Name Remember Me?

Delphi Access Violation At Address Read Of Address

Not the answer you're looking for? Bye, Andy If it helped please click accept... Have you looked at the call stack in the debugger when the AV occurs? Why are copper cables round?

The place to exchange ideas and experiences on Delphi programming Skip to content Advanced search Board index ‹ DELPHI AREA ‹ Delphi Programming Change font size Print view FAQ Register Login When I ran the executable outside of the debugger, many features continued to function properly, but the RS232 communication stops dead. share|improve this answer answered Apr 27 '10 at 17:08 Chris Thornton 12.8k32452 That won't cause an access violation for accessing a simple variable. –Loren Pechtel Apr 27 '10 at The code communicates over a COM port using RS232.

Page 1 of 2 1 2 > Thread Tools Display Modes #1 07-09-2002, 10:34 AM helenchu Junior Member Join Date: Jun 2002 Posts: 7 EAccessviolation ?? Here is a snippet from the code: String s,ss; ss = fLocalName + " skip"; for (int i = 0; i < fFrameLen; i++) { s.printf(L" 0x%02X", FrameData[i]); ss += s; Sir Richard Abramson Регистрация: 05.04.2008 Сообщения: 5,408 Версия Delphi: XE10 Репутация: выкл Вызываешь что-то с несозданного объекта. Весь твой код смотреть лень, но скорее всего где-то конструктор не вызван. __________________ I was able to transmit about twice as much data, but then the thread had an access violation again, at the same location, and stopped RS232 communication.

The code the failure occurs at seems relatively innocuous, but the project is on the larger side. That doesn't fit what you're trying to do here at all, since you're writing, not reading, and you're writing a constant, not a variable read from somewhere. This question troubles me, though sometimes nothing occurs... Was the London Blitz accidentally started by lost pilots?

Access Violation At Address In Module Delphi

I attempted this, and saw a significant improvement. Hello, I took your advice and declared the frmIdentify locally, however, it has nothing to do with that. Delphi Access Violation At Address Read Of Address When you get an access violation from a piece of code like this that has no sane way of producing an access violation you're looking at trashed memory in some fashion. How To Fix Access Violation At Address Hello Below is what i have, if i run it for the 1st time, everything is ok, but then when I close the form frmIdentify, i got this error msg "Project

Browse other questions tagged c++builder or ask your own question. check my blog Read of address 00000008'. --------------------------- Break Continue Help --------------------------- –J... The code the failure occurs at seems relatively innocuous, but the project is on the larger side. I started searching the web for ideas, and came across a few suggestions.

I've tried declaring the variable local to the unit, to the procedure, globally - no matter where I try to do it I can't assign a value of zero to an please excuse my very limited knowlege about programming, I just start playing recently. 1/ I have my frmIdentify in "Available forms" not "Autocreate forms" do i still need to take it Why here? http://arnoldtechweb.com/access-violation/weblogic-exception-access-violation.html Find all posts by figueroamar #3 07-09-2002, 12:15 PM helenchu Junior Member Join Date: Jun 2002 Posts: 7 RE: tried your code, didn't work either :( Hi there,

The fine toothed comb is always a last resort, I was hoping I'd done something obviously wrong which may have been apparent. Interestingly, that was cool because the array was declared BELOW the pointer, but he "underflowed" by using element [0] when the array was declared [1..5]. When I restart the tool the RS232 communication works again, but always stops after the same number of bytes have been sent and received.

I've broken my new MacBook Pro (with touchbar) like this, do I have to repair it?

  1. It sets 'recordfileexists' to 'true', but then when it tries to execute the 'LoadFromFile()', that's when I get the error.
  2. Voltar ao Topo joemilModeradorRegistrado: Quinta-Feira, 25 de Março de 2004Mensagens: 8466Localização: Sinop-MT Enviada: Sex Fev 08, 2008 9:35 am Assunto: isso acontece pq vc ta tentando acessar algum componente q ainda
  3. Changing the data type would not make a difference if fLocalName is a class member being accessed via an invalid 'this' pointer. -- Remy Lebeau (TeamB) I followed your suggestion, and
  4. River_Forest Brian Hamilton ...
  5. Just the same, problem solved.
  6. GSUR, а вам архангельского в руки для начала... ну а потом побольше жимайте на f1 - он вам поможет @GSUR 3 / 3 / 2 Регистрация: 27.05.2010 Сообщений: 60 20.09.2010,

Editado August 14, 2012 por Junior Silva Compartilhar este post Link para o post Compartilhar em outros sites Jhonas 0 Monitores 0 8.573 posts Gender:Male Location:SГЈo Paulo Postado August 14, Posts: 7,187 Registered: 12/23/01 Re: Raised exception class $C0000005 - access violation Reply Posted: Dec 12, 2016 12:27 PM in response to: Samuel Johnson Samuel wrote: The Juggling things around and accessing it later also was throwing exceptions. **edit - actually, it was the TListBox that was being cleared. Join them; it only takes a minute: Sign up Project raised exception class EAccess Violation in BCB 6.0 up vote 0 down vote favorite My code can compile successfully and run,

Thanks to everyone for good ideas. As a result, I have not yet been able to distill this down to an easy to reproduce condition, although I can make some general observations. If the problem goes away, look at the vars declared above where you have it now - you may find something interesting, such as an array that is growing past its http://arnoldtechweb.com/access-violation/memory-access-violation-exception.html The RS232 IO is running on it's own thread, so I suppose the other threads go happily on their way.

Which implies that it is being accessed via a 'this' pointer that is no longer valid when the AV occurs. misty29 Member Posts: 1Joined: November 18th, 2015, 7:27 pm Top Post a reply 1 post • Page 1 of 1 Return to Delphi Programming Jump to: Select a forum ------------------ Write of address ..........' Process stopped.