Access violation of member of pointer object

Posted by Martin Lauridsen on Stack Overflow See other posts from Stack Overflow or by Martin Lauridsen
Published on 2010-04-26T11:32:46Z Indexed on 2010/04/26 11:33 UTC
Read the original article Hit count: 435

Filed under:

access

|

accessviolationexception

|

c++

|

pointers

So I am coding this client/server program. This code is from the client side. The client has an instance of an object

mpqs_sieve *instance_;

The reason I make it as a pointer is, that mpqs_sieve only has a constructor that takes 3 arguments, and I want to instantiate it at a later point in time.

The client first gets some data from the server, and uses this to instantiate instance_. After this, it will request some more data, and upon receiving this (these are three coeffecients for a quadratic polynomial), it should set these in the instance_ object. However upon calling a member function of instance_, I get an access violation on one of the members of instance_ within that function call.

I posted my code here: on pastebin, and I get the error on line 100. The call comes from line 71, and before that line 21.

Any ideas to solve this? Thanks!

© Stack Overflow or respective owner

Related posts about access

Postgres user drop

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to drop a user: drop user testUser; I want to force this to work in a simple manner (Not a million calls)... How can I do this easily? I get this output: ERROR: role "testUser" cannot be dropped because some objects depend on it DETAIL: access to table main.tap_db_version access… >>> More
Postgres user/role drop

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to drop a user: drop user testUser; I want to force this to work in a simple manner (Not a million calls)... How can I do this easily? I get this output: ERROR: role "testUser" cannot be dropped because some objects depend on it DETAIL: access to table main.tap_db_version access… >>> More
ASA hairpining: I basicaly want to allow 2 spokes to be able to communicate with each other.

as seen on Server Fault - Search for 'Server Fault'
ASA Spoke to Spoke Communication I have been looking at spke to spoke comms or "hairpining" for months and have posted on numerouse forums but to no avail. I have a Hub and spoke network where the HUB is an ASA Firewall version 8.2 * I basicaly want to allow 2 spokes to be able to communicate with… >>> More
.NET Access automation with Access 2007 Runtime

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm having trouble deploying .NET application which uses Microsoft Access automation. I've installed the Access 2007 Runtime and Primary Interop Assemblies (PIAs) on the target machine: Access 2007 Runtime Office 2007 PIAs However, when I try to create the ApplicationClass: Application access… >>> More
Cisco 800 series won't forward port

as seen on Server Fault - Search for 'Server Fault'
Hello ServerFault, I am trying to forward port 444 from my cisco router to my Web Server (192.168.0.2). As far as I can tell, my port forwarding is configured correctly, yet no traffic will pass through on port 444. Here is my config: ! version 12.3 service config no service pad service tcp-keepalives-in service… >>> More

Related posts about accessviolationexception

AccessViolationException, attempted to read or write protected memory

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm using a dll that contains unsafe code for interacting with specific hardware, and I'm trying to use it from C#, but I keep getting an AccessViolationException. What's causing it, and how can I fix it? namespace FingerPrint { public unsafe partial class Form1 : Form { [DllImport("MyDll… >>> More
C# WebBrowser Control System.AccessViolationException

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a program that uses the built in webbrowser control. At some point during the usage of this, I'm not sure at what point, but it appears to be random, I get the following error: System.AccessViolationException FullText = System.AccessViolationException: Attempted to read or write protected… >>> More
DLLImport error: System.AccessViolationException with Manifest file and c#

as seen on Stack Overflow - Search for 'Stack Overflow'
When trying to call (DLLImport) an external c++ dll from a .net application that has a manifest file with requireAdministrator, I get this error trying to call function from the C++ dll in Windows 7 with UAC enabled. Method I am calling: EnCrypts System.AccessViolationException: Attempted to read… >>> More
AccessViolationException from a combo: Attempted to read or write protected memory

as seen on Stack Overflow - Search for 'Stack Overflow'
Users are occassionally getting the above error when using our application (VB.Net, Winforms, using v2 of the framework). I'm not able to reproduce it. The callstack is as follows: : System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other… >>> More
AccessViolationException thrown

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I’m working on a project that’s written in C# and uses a C++ dll to communicate with a robot. Originally the software was written in C# VS 2003 and was converted to VS 2008 (no change to the code) using .Net 2.0. Now, I started seeing the “Attempted to read or write protected memory…” on some… >>> More