Solved

EAcessViolation Error

Posted on 1997-08-16
4
261 Views
Last Modified: 2010-04-03
I'am a italian beginner of delphi 2.0 and I have a problem:

Executing this command:
   WinExec('ARJ.EXE x -va -r -y C:\*.ARJ C:\PROVA',                                                                                              SW_MINIMIZE);
or this command:
   ShellExecute(0,'Open','ARJ.EXE','x -va -r -y :\*.arj c:\prova','',                                                                                                       SW_MINIMIZE);

the ARJ is executed correctly but appeat this error message:

Project Prova.exe raised exception class EAccessViolation with message
'Access violation at address 455C3A44. Read of address 455C3A44'. Process
stopped. Use Step or Run to continue.

Changing the parameters of ARJ the address violated changing.

What is the problem?
Can you explain a possible solution, please?
thank you.
Gianmario Da Vià
nodil@hotmail.com
0
Comment
Question by:nodil
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 

Author Comment

by:nodil
ID: 1341622
Edited text of question
0
 

Expert Comment

by:chrb
ID: 1341623
What is comming after this command ?
0
 
LVL 3

Expert Comment

by:sperling
ID: 1341624
Please post some more code, there's nothing wrong with the snippets you've posted.

Regards,

Erik.
0
 
LVL 5

Accepted Solution

by:
ronit051397 earned 100 total points
ID: 1341625
If you process the arj command, and the next lines in your code refer to these files that were opened and/or to the compressed files then sometimes you have a problem becuase your delphi program continues to run while the arj process hasn't finished yet. Therefore you have to suspend the delphi program from stepping to the next code line until the arj process is finished.
For example if the next line is deleting *.arj then you'll get an error becuase these files are locked until all opening is done.
To suspend the delphi program create some loop, say with the
application.processmessages method, or use a timer.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

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

In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
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…
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…

724 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