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Access Violation At Address Delphi 7


The heap is used for storing dynamic data. asked 5 years ago viewed 27850 times active 10 months ago Linked 0 Access violation, Delphi 2005 TADOQuery 3 Development of MySQL.pas wrapper for Delphi 1 Delphi : Error 'Access violation The all-zero address indicates you've tried to use a nil pointer in application foo.exe. Memory for global variables is allocated by OS loader when executable module is loading and it is freed when module is unloading. http://qaisoftware.com/access-violation/delphi-catch-access-violation.html

Then, after closing Delphi, the errormessage became: "The instruction at .... Reinstall Delphi? 0 Message Author Comment by:Ron_de_Weijze ID: 119962522004-09-07 Went ahead and started Repair which is on the install disks. 0 Message Author Comment by:Ron_de_Weijze ID: 119963272004-09-07 The repair Try our newsletter Sign up for our newsletter and get our top new questions delivered to your inbox (see an example). For example, you can not access a VCL objects from another thread as VCL is not thread-safe - you should use Synchronize for this.

Delphi Access Violation At Address 00000

main thread ($a60): 0082a534 vcl70.bpl Controls TDockTree.RemoveZone 0082a397 vcl70.bpl Controls TDockTree.RemoveControl 0 LVL 22 IF you can't reproduce it in your debugger, but it consistently reproduces on a certain system, you need to get useful debugging information from that system. We typically think of the instructions at an address reading and writing from memory at certain addresses. There is nothing else I can do, is there? 0 LVL 22 Overall: Level 22 Delphi 21 Message Active 3 days ago Accepted Solution by:Ferruccio Accalai Ferruccio Accalai earned 300

If you can get into that account in Safe Mode then remove all entries in startup via msconfig. If you have stack corruption, though, you might not be able to trust the call stack. Using the program: "Project projectname.exe raised exception class EInvalidOperation with message ‘Cannot focus a disabled or invisible window’. How To Fix Access Violation At Address Delphi In the next time, we'll talk about cases, when there IS a bug in your code, but there is no access violation!

So advice and tips would be very useful. How To Fix Access Violation At Address Message Author Comment by:Ron_de_Weijze ID: 120058002004-09-08 The problem is showing its ugly face again. All rights reserved. check my blog I know that does not solve the problem but like anything, there is a process of elimination and this step here will at least make it a little less annoying.

MadExcept makes it pretty easy to track these things down, and is free for non-commercial use. (Actually, a commercial use license is pretty inexpensive as well, and well worth the money.) Access Violation At Address Windows 7 If there is only a bug-report - then you should use your telepathic abilities to find out the truth. Thanks, Ron. 0 LVL 22 Overall: Level 22 Delphi 21 Message Active 3 days ago Expert Comment by:Ferruccio Accalai ID: 120153782004-09-09 well, first read this comment from rllibby (one of The program opens, no problem 5.

How To Fix Access Violation At Address

Apart from error's message, there can be another information, which comes from assembly and CPU tabs in EurekaLog's bug-report: You can see the assembly listing of your program on the first For example: var Lib1, Lib2: HMODULE; Proc: procedure; ... Delphi Access Violation At Address 00000 Join Now For immediate help use Live now! Delphi Find Error Nodes can be multiple selected and exported (the export iterates through each selected node and saves specific data to a text file - the information saved to the text file is

Worse even, some of the settings (those that end in "Data") are hexadecimal values used by the ide when the desktop file is loaded. this contact form It appears that computer F1 is the culprit. So far so good. (Do pray.) 0 LVL 27 Overall: Level 27 Delphi 26 Message Expert Comment by:kretzschmar ID: 120208822004-09-09 >(Do pray.) i do, good luck ;-) 0 Message Because of new General Note by Asus: Now I will have to do that TWICE and then Clear the CMOS by sticking a small stick through hole in the back plate. Madexcept

  1. I can click many times on button and nothing.
  2. Passing data between modules.
  3. We already talked about such situations before.
  4. This confirms the description I have given you.
  5. You can also double-click on line to go to a particular location.
  6. Reports: · Posted 4 years ago Top raphoenix Posts: 14920 This post has been reported.

The most recent change I made was add a line that called the ColorDialog from the VCL. But even then, I doubt we can do much more than guess. Read of address 0000016C The bold text in code bellow is checked while debugging. have a peek here Pretty confusing!

Subscribed! Access Violation At Address In Module Write Of Address For example, we can access a deleted object, but our memory manager still wasn't return memory to the system, so our access can be successful. Especially, if you do a manual allocate or free of objects somewhere in your program.

And here's the reason for you: the variable, used in assignment, was = nil.

Typically, this is the options "Use Debug DCUs" and "Stack frames". Process stopped. If ZZZ is large - then your code tried to access an object via non-nil invalid pointer. Access Violation At Address 00000000. Read Of Address 00000000 In Toad Ron dW. 0 LVL 22 Overall: Level 22 Delphi 21 Message Active 3 days ago Expert Comment by:Ferruccio Accalai ID: 120167522004-09-09 Ron_de_Weijze, if you've asked it for me (as i'm

That is, saved it from the reinstalled environment, to overwrite the old one that directly caused the problem in the old one. Re-installing Delphi does work however upon rebooting the old symptoms return. delphinn View Public Profile Send a private message to delphinn Find all posts by delphinn #4 01-21-2014, 10:15 AM kolbasz Senior Member Join Date: Nov 2013 Posts: 837 Check This Out To make things worse: this memory is heavily used by application (as oppose to the memory, which were released by the object destruction).

Global variables are those, which declared outside of class or any routine. I will re-open this problem under a new name 'Delphi IDE error' (new points) and redescribe it with the extra info I have now. It can be form, component, object, array, record, string or simple integer. Let me tell you some more about the background.

The "write" means that the exception occurred during writing, the "read" means that, well, the problem while reading (quite obvious, isn't it?). Rick P. (Asus Shill) Reports: · Posted 4 years ago Top wilson382 Posts: 39 This post has been reported. But there's enough to give you some useful clues: Access violation, read of address 00000000, means that someone tried to dereference a null pointer. Each time user A accesses record Z on computer F1, the following error is displayed: Access violation at address 00642E83 in module 'foo.exe'.

Are there any work with objects?