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Debug Error Damage Before Normal Block

Note in addition that the debug version of VC has debug heap procedures that allow you to record the file name and line number of the line that allocates a block e.g. Here is the code : VB Code: StudentListNodePtr DelStudent(char* studentID, StudentListNodePtr head){ StudentListNodePtr temp,currentStudent,previousStudent; while(head != NULL){ head = head->next; if((strcmp(head->student.studentID,studentID)) == EQUAL) { Comment Submit Your Comment By clicking you are agreeing to Experts Exchange's Terms of Use. http://hammerofcode.com/debug-error/debug-error-damage-after-the-normal-block.php

Privacy Policy Site Map Support Terms of Use Connect with us facebook twitter CNET Reviews Top Categories CNET 100 Appliances Audio Cameras Cars Desktops Drones Headphones Laptops Networking Phones Printers Smart Thanks anyway. 0 Message Author Comment by:oohchild2000-11-04 On second thought, isn't correct either. Featured Post What Security Threats Are You Missing? Make sure you never use functions like 'gets', which will not stop at the end of an array.: : You can also use tools like Electric Fence or BoundsChecker to help

You're writing to memory that doesn't belong to you.: : The debug version of malloc will often initialize it's memory pool with a known value (Microsoft uses 0xCD), or sometimes it Track this discussion and email me when there are updates If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and However, it can (theoretically) be caused by a random pointer write (after all, it could write to the guard value). The debugger is also telling you exactly where this is happening: Damage: after Normal block (#73) at 0x00AE1600" Find which memory is allocated at 0x00AE1600 and it will help track this

You're only giving it 8 bytes in each of the four allocated pointers you are passing. 0 LVL 32 Overall: Level 32 C++ 10 Message Expert Comment by:jhance2000-11-02 Do you The most I can do is to isolate the error and reflect to the external party. CContext pCC = new CContext(); // ... Code: // strng3.h -- String class definition //MODIFY AS NEEDED #ifndef _STRNG3_H_ #define _STRNG3_H_ #include using namespace std; class String { private: char * str; // pointer to string int

To start viewing messages, select the forum that you want to visit from the selection below. The function also includes des.h (and des.cpp) which is incorporated into the application for DES encryption purpose. Solved Debug Error in Visual C++ program -- "Damage after Normal block (#56) at 0x00304700" Posted on 2005-08-16 C++ 1 Verified Solution 2 Comments 1,388 Views Last Modified: 2008-03-06 I recently http://forums.codeguru.com/showthread.php?367849-Debug-Error-Damage-after-normal-block When I attempt to run the code in the Visual C++ 6 IDE, it seems to run fine until the destructor of one of the classes is called.

current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Guess its when I'm using the delete [] str but can't trace the error. It looks like you're new here. Advanced Search VBForums Other Languages C and C++ a strange error : DAMAGE: after Normal Block (#56) at 0x00411300 If this is your first visit, be sure to check out the

ArcMap World borders overlay? I make use of some "extern "C"" to ensure smooth linking. 0 LVL 22 Overall: Level 22 C++ 20 Message Expert Comment by:nietod2000-11-03 Do you even know what the Are you sure that the 'getkey' function is being called correctly. 0 Message Expert Comment by:OlaOdling2000-11-02 Please also state when does this error occur during processing. 0 LVL 32 We're saying that you are passig parameters that are not meeting the requirements of the getkey function or other functions you are calling.

do something on pCC delete pCC; // error message pops up here. this page Now if you: delete [] p; it will detect this and report it as you see above. Then I get the following Debug Error: "DAMAGE: after Normal block (#56) at 0x00304700. kristofr Member Posts: 3 February 2002 in C and C++ When I try to run my C++ executable, midway through the program I get a pop-up error declaring :Debug Error!DAMAGE: after

Then, if you write past the end of an allocated block, 'malloc' can detect it, and you get an error message like the one you saw.: : : how to prevent asked 7 years ago viewed 5375 times active 7 years ago Blog International salaries at Stack Overflow Linked 0 Debug Visual C++ memory allocation problems 0 Domino Microsoft Visual C++ Debug allocated a block of 10 bytes and written 20 bytes to it. http://hammerofcode.com/debug-error/debug-error-damage-after-normal-block.php I have hundreds of friends.

Advanced Search Forum Visual C++ & C++ Programming Visual C++ Programming Debug Error: Damage after normal block If this is your first visit, be sure to check out the FAQ by Don't know why it would wait a week to give problems nor why a Microsoft made theme would cause the system to puke, but who knows.Thanks againWayne Flag Permalink Reply This It's quick & easy.

String & String::operator+(const String & st) { str = strcat (str, st.str); len = strlen(str); return *this; } Hope that helps.

Lastly, Part 3 focuses on th… C++ Introduction to C++: Functions - Defining, Calling, Prototypes Video by: Ian The goal of the tutorial is to teach the user how to use Know it might be difficult to debug in this case, given the lack of information. Marked as answer by nobugzMVP, Moderator Tuesday, April 07, 2009 2:23 AM Monday, April 06, 2009 4:36 PM Reply | Quote 0 Sign in to vote thanks brian that did the the vet can't help you.

Unless you really want to see the output shown in the "disassembly" window which gives me a headache tracing through the calls. I would suggest couple of ways which can help you to detect this scenario: Using tools like Rational Purify: Its good tool to detect memory corruption. They MUST Have provided you with some sort of documentation, right? 0 Message Author Comment by:oohchild2000-11-04 honestly speaking, I don't exactly know what the function internally does except it calculate useful reference cheers mate!

To start viewing messages, select the forum that you want to visit from the selection below. Wo don't. Subscribe to our monthly newsletter for tech news and trends Membership How it Works Gigs Live Careers Plans and Pricing For Business Become an Expert Resource Center About Us Who We It will lock up, or sometimes automatically close itself.

Visual Studio Languages , Windows Desktop Development > Visual C++ Question 0 Sign in to vote Hi, i have a dynamic byte array "ba". doesn't crash here p[10] = 8; //Try to delete..crashes.. All submitted content is subject to our Terms of Use.