Application Error
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Hi all i have developed a MFC Dialoag based application (server application TCP/IP communication a socket programming) on windows xp sp2. I am getting application error message on one of the machine. but some other machine it is working fine. I am not able to fix this bug please help me . The Error message is: The instruction at "0x7c911948" referenced memory at "0x00000000".The memory could not be "read", click on OK to terminate the program click on CANCEL to debug the program What error it is and how to fix it ? Thanks in advance
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Hi all i have developed a MFC Dialoag based application (server application TCP/IP communication a socket programming) on windows xp sp2. I am getting application error message on one of the machine. but some other machine it is working fine. I am not able to fix this bug please help me . The Error message is: The instruction at "0x7c911948" referenced memory at "0x00000000".The memory could not be "read", click on OK to terminate the program click on CANCEL to debug the program What error it is and how to fix it ? Thanks in advance
It means your app tried to access memory using a null pointer. To fix: Run your app under the debugger, check the call stack when it breaks.
Best wishes, Hans
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It means your app tried to access memory using a null pointer. To fix: Run your app under the debugger, check the call stack when it breaks.
Best wishes, Hans
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Should be down the bottom, but you can activate it via Debug>Windows>Call Stack
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Should be down the bottom, but you can activate it via Debug>Windows>Call Stack
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Hi all i have developed a MFC Dialoag based application (server application TCP/IP communication a socket programming) on windows xp sp2. I am getting application error message on one of the machine. but some other machine it is working fine. I am not able to fix this bug please help me . The Error message is: The instruction at "0x7c911948" referenced memory at "0x00000000".The memory could not be "read", click on OK to terminate the program click on CANCEL to debug the program What error it is and how to fix it ? Thanks in advance
A call stack is the bare minimum.
Steve
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Hi all i have developed a MFC Dialoag based application (server application TCP/IP communication a socket programming) on windows xp sp2. I am getting application error message on one of the machine. but some other machine it is working fine. I am not able to fix this bug please help me . The Error message is: The instruction at "0x7c911948" referenced memory at "0x00000000".The memory could not be "read", click on OK to terminate the program click on CANCEL to debug the program What error it is and how to fix it ? Thanks in advance
The other way out is click on 'CANCEL' button to debug. Before that copy the source code on the machine where you get the above crash. Open the project in visual studio and build the project in 'DEBUG' mode. Now run the application and click 'CANCEL' button to debug when the above error occurs. When OS asks for debugger to attache, provide the running instance of the visual studio, that will take you to the point where the access violation is raised.
[Delegates] [Virtual Desktop] [Tray Me !]
-Malli...! :rose:**** -
The other way out is click on 'CANCEL' button to debug. Before that copy the source code on the machine where you get the above crash. Open the project in visual studio and build the project in 'DEBUG' mode. Now run the application and click 'CANCEL' button to debug when the above error occurs. When OS asks for debugger to attache, provide the running instance of the visual studio, that will take you to the point where the access violation is raised.
[Delegates] [Virtual Desktop] [Tray Me !]
-Malli...! :rose:****this error because i am creating multiple thread using AfxBeginThread() see below my code : WSADATA wsaData; WSAStartup(0x0101, &wsaData ); struct sockaddr_in stSockaddr_in; struct sockaddr stSockaddr; SOCKET sock; fd_set readfds1; FD_ZERO( &readfds1); //create listening socket sock = socket(AF_INET,SOCK_STREAM,0);//create socket //sets the family,port and the addrees stSockaddr_in.sin_family = AF_INET; stSockaddr_in.sin_addr.s_addr = INADDR_ANY; stSockaddr_in.sin_port = htons(9000) //Use bind to establish the local association of the socket by assigning a local name to an unnamed socket int nRet = bind(sock, (LPSOCKADDR)&stSockaddr_in, sizeof(struct sockaddr));//bind //listen function places a socket a state where it is listening for an incoming connection if(listen( sock, MAX_CONNECTS ) < 0)//listen { //listen error return 0; } SOCKET ret_sock; //accept the connection ret_sock = accept(sock,&stSockaddr,NULL); if(INVALID_SOCKET != ret_sock) { char szBuffer[MAX_BUF_LEN]; //to receive the configuration data int iLength = recv( ret_sock,(char*) szBuffer, MAX_BUF_LEN, 0 ); szBuffer[iLength] = 0; CString csBuffer; int iLen = strlen(szBuffer); WCHAR wcStr[MAX_DATA_SIZE]; memset(wcStr,'\0',sizeof(WCHAR)*MAX_DATA_SIZE); mbstowcs( wcStr,szBuffer,iLen); csBuffer.Format(L"%s",wcStr); //////////////////////////////////////////////////////////////////////// if(!csBuffer.IsEmpty())//data is not empty { CWinThread *Thread = NULL; Thread = AfxBeginThread(func,(LPVOID)&someValue,THREAD_PRIORITY_NORMAL,0,0,NULL); //Here only i am getting the apllication error (Not Creating Multiple thead) } } How to resolve this problem ?
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this error because i am creating multiple thread using AfxBeginThread() see below my code : WSADATA wsaData; WSAStartup(0x0101, &wsaData ); struct sockaddr_in stSockaddr_in; struct sockaddr stSockaddr; SOCKET sock; fd_set readfds1; FD_ZERO( &readfds1); //create listening socket sock = socket(AF_INET,SOCK_STREAM,0);//create socket //sets the family,port and the addrees stSockaddr_in.sin_family = AF_INET; stSockaddr_in.sin_addr.s_addr = INADDR_ANY; stSockaddr_in.sin_port = htons(9000) //Use bind to establish the local association of the socket by assigning a local name to an unnamed socket int nRet = bind(sock, (LPSOCKADDR)&stSockaddr_in, sizeof(struct sockaddr));//bind //listen function places a socket a state where it is listening for an incoming connection if(listen( sock, MAX_CONNECTS ) < 0)//listen { //listen error return 0; } SOCKET ret_sock; //accept the connection ret_sock = accept(sock,&stSockaddr,NULL); if(INVALID_SOCKET != ret_sock) { char szBuffer[MAX_BUF_LEN]; //to receive the configuration data int iLength = recv( ret_sock,(char*) szBuffer, MAX_BUF_LEN, 0 ); szBuffer[iLength] = 0; CString csBuffer; int iLen = strlen(szBuffer); WCHAR wcStr[MAX_DATA_SIZE]; memset(wcStr,'\0',sizeof(WCHAR)*MAX_DATA_SIZE); mbstowcs( wcStr,szBuffer,iLen); csBuffer.Format(L"%s",wcStr); //////////////////////////////////////////////////////////////////////// if(!csBuffer.IsEmpty())//data is not empty { CWinThread *Thread = NULL; Thread = AfxBeginThread(func,(LPVOID)&someValue,THREAD_PRIORITY_NORMAL,0,0,NULL); //Here only i am getting the apllication error (Not Creating Multiple thead) } } How to resolve this problem ?
To fix: Run your app under the debugger, check the call stack when it breaks.
Best wishes, Hans
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To fix: Run your app under the debugger, check the call stack when it breaks.
Best wishes, Hans
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Why does it break? What source line does it break on? What module? If it breaks because of an assert, what does the assert statement say? If it breaks because of a null pointer, what is the pointer supposed to be pointing to? How do you expect us to help you when you don't give us all the details?
Best wishes, Hans
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Why does it break? What source line does it break on? What module? If it breaks because of an assert, what does the assert statement say? If it breaks because of a null pointer, what is the pointer supposed to be pointing to? How do you expect us to help you when you don't give us all the details?
Best wishes, Hans
i have created parent thread, AfxBeginThread(parent,this,THREAD_PRIORITY_NORMAL,0,0,NULL); declaration : class CTestApp : public CWinApp { public: static UINT parent(LPVOID lpParam); static UINT child(LPVOID lpParam); ///////////////////////////////////////////////////////////////////////////// definition: UINT CTestApp::parent(LPVOID lpParam) //multiple client request the parent { //..... //listening socket and create new thread if(!csBuffer.IsEmpty())//data is not empty { CWinThread *Thread = NULL; Thread = AfxBeginThread(child,(LPVOID)&someValue,THREAD_PRIORITY_NORMAL,0,0,NULL); //Here only i am getting the apllication error (Not Creating Multiple thead) } return 1; } UINT CTestApp::child(LPVOID lpParam) //mulitple times its has to created { //do stuff return 1; } i hope this time i have given clearly my problem. I am tryng to create a multiple threads -- Modified Monday, January 24, 2011 11:08 AM
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this error because i am creating multiple thread using AfxBeginThread() see below my code : WSADATA wsaData; WSAStartup(0x0101, &wsaData ); struct sockaddr_in stSockaddr_in; struct sockaddr stSockaddr; SOCKET sock; fd_set readfds1; FD_ZERO( &readfds1); //create listening socket sock = socket(AF_INET,SOCK_STREAM,0);//create socket //sets the family,port and the addrees stSockaddr_in.sin_family = AF_INET; stSockaddr_in.sin_addr.s_addr = INADDR_ANY; stSockaddr_in.sin_port = htons(9000) //Use bind to establish the local association of the socket by assigning a local name to an unnamed socket int nRet = bind(sock, (LPSOCKADDR)&stSockaddr_in, sizeof(struct sockaddr));//bind //listen function places a socket a state where it is listening for an incoming connection if(listen( sock, MAX_CONNECTS ) < 0)//listen { //listen error return 0; } SOCKET ret_sock; //accept the connection ret_sock = accept(sock,&stSockaddr,NULL); if(INVALID_SOCKET != ret_sock) { char szBuffer[MAX_BUF_LEN]; //to receive the configuration data int iLength = recv( ret_sock,(char*) szBuffer, MAX_BUF_LEN, 0 ); szBuffer[iLength] = 0; CString csBuffer; int iLen = strlen(szBuffer); WCHAR wcStr[MAX_DATA_SIZE]; memset(wcStr,'\0',sizeof(WCHAR)*MAX_DATA_SIZE); mbstowcs( wcStr,szBuffer,iLen); csBuffer.Format(L"%s",wcStr); //////////////////////////////////////////////////////////////////////// if(!csBuffer.IsEmpty())//data is not empty { CWinThread *Thread = NULL; Thread = AfxBeginThread(func,(LPVOID)&someValue,THREAD_PRIORITY_NORMAL,0,0,NULL); //Here only i am getting the apllication error (Not Creating Multiple thead) } } How to resolve this problem ?
So have you stepped into
AfxBeginThread()to see what is going on?"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Man who follows car will be exhausted." - Confucius