Solved

Access violation

Posted on 1998-12-03
1
1,472 Views
Last Modified: 2008-02-26
Occassionally I get this message : access violation at address 413070B2 in module VCL30.DPL. read of address 00EF0000.

Any idea what cause it ?
0
Comment
Question by:ray3898
1 Comment
 
LVL 2

Accepted Solution

by:
Thaddy earned 50 total points
ID: 1349129
It means that somewhere in your application, the VCL expected a valid pointer that isn't there anymore.
A common mistake that causes this is for example to
free a class instance more than once.
Another one is to manually release a form with 'FREE' when it was created by application.createform instead of Tform.create.
(In that case the application tries tofree the form again.
Check for manually released classes and check of they are freed more than once.
There can be a whole host of other causes but freeing a class more than once is the most common
0

Featured Post

Secure Your Active Directory - April 20, 2017

Active Directory plays a critical role in your company’s IT infrastructure and keeping it secure in today’s hacker-infested world is a must.
Microsoft published 300+ pages of guidance, but who has the time, money, and resources to implement? Register now to find an easier way.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Hello everybody This Article will show you how to validate number with TEdit control, What's the TEdit control? TEdit is a standard Windows edit control on a form, it allows to user to write, read and copy/paste single line of text. Usua…

685 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question