Application error

Nelly · #1 03-May-2004, 07:11

Hello,

Can anyone help me to understand the following error I get while running my program:

" This instruction at "0x10213035" referenced memory at "0x00000065". The memory could not be read.
Click on OK to terminate the program"

and

" This instruction at "0x102125fe" referenced memory at "0x00000092". The memory could not be written.
Click on OK to terminate the program".

machinated · #2 03-May-2004, 07:18

your program is trying to access the region of memory that it shouldnt. system is denying it access and terminating it. either your accessing it thru your array or a pointer. post your code if you need help in figuring it out

Nelly · #3 03-May-2004, 08:17

representing different feature points on a face, which is extracted from a video frame.

CPP / C++ / C Code:

struct Face  
  {
	int Mouth;	
	int Eye;							int nose				
             int FrameNo;			
   };

When I press the Apply button on my FormView, to save my Structure to my vector called 'Feat'.

CPP / C++ / C Code:

void CFeature::OnApply() 
{
	// TODO: Add your control notification handler code here
	CMFFADoc* pDoc = GetDocument();
	UpdateData(TRUE);

	 pDoc->m_pnt.x = m_X ;
	 pDoc->m_pnt.y = m_Y ;
	 pDoc->m_CurrentFrame = FaceFeat.FrameNo;



	 // 3 - Tell the document something happened
	pDoc->SetModifiedFlag( TRUE );

	// 4 - Synchronize all other views
	pDoc->UpdateAllViews( this );

	//Save Face buffer to vector
	saveFeatures( Feat);
	
}

This is save function the save structure to the vector:
Please note that I need to save(push) several Face structure in the vector.
that is each time I press the Apply button, I need to push a different set of Face to the vector:

CPP / C++ / C Code:

void CFeature::saveFeatures (std::vector < Face > & Feat)
{
	
	Feat.push_back(FaceFeat);
	return;
}

Then I have another button on my FormView to save the Vector to a file:

CPP / C++ / C Code:

void CFeature::OnSaveft() 
{
	CMFFADoc* pDoc = GetDocument();

	 
	//  Synchronize all other views
	pDoc->UpdateAllViews( this );
            WriteFaceVector(ftname ,  Feat);
}

This function write the vector to the file.
I'm taking info (Structure) from a video file(.vid) and save them in a new file with the same name as the video file but with (.fea) ext:

CPP / C++ / C Code:

bool CFeature::WriteFaceVector(  char * ftname , const vector<Face> & v)
{
	m_FtFileName =  VC.m_VidFileName;

	//Need to convert file name from CString to Char*
	ftname = m_FtFileName.GetBuffer(m_FtFileName.GetLength());
	
	char* pos;

	pos = strrchr(ftname,'.');//Find the ext
	*(pos+1) = 0;
	strcat(ftname,"fea"); //Create new ext
	ofstream m_FeatureFile(ftname,ios::binary);
    if (!m_FeatureFile) return false;

	std::vector<Face>::size_type size(v.size());
    m_FeatureFile.write(reinterpret_cast<const char*>(&size), sizeof (std::vector<Face>::size_type));     

    for(std::vector<Face>::size_type i =0; i < size; ++i)
    {
      if(0 != size)
    m_FeatureFile.write(reinterpret_cast<const char*>(&v[i]), size * sizeof   (Face));
    }
  return true;
}

hope the explanation is clear enough.

machinated · #4 03-May-2004, 08:35

Quote:

//Need to convert file name from CString to Char*
ftname = m_FtFileName.GetBuffer(m_FtFileName.GetLength());

what data type is m_FtFileName? and what exactly does GetBuffer return? Does it return a pointer to the filename?

if possible, can u post the code to GetBuffer function?

Nelly · #5 03-May-2004, 12:36

the m_FtFileName is a string, the variable for my new file.
First, I've assigned it the same value as the video file VC.m_VidFileName, which is also a string.
Then i've used:

CPP / C++ / C Code:

  m_FtFileName.GetBuffer(m_FtFileName.GetLength());
to get the Filename, so that I can find the position of the ext ('.') by doing:

char* pos;

  pos = strrchr(ftname,'.');//Find the ext
  *(pos+1) = 0;
  strcat(ftname,"fea"); //Create new ext

machinated · #6 03-May-2004, 13:44

Quote:

Originally Posted by Nelly

the m_FtFileName is a string, the variable for my new file.
First, I've assigned it the same value as the video file VC.m_VidFileName, which is also a string.
Then i've used:
m_FtFileName.GetBuffer(m_FtFileName.GetLength());
to get the Filename, so that I can find the position of the ext ('.') by doing:

char* pos;

pos = strrchr(ftname,'.');//Find the ext
*(pos+1) = 0;
strcat(ftname,"fea"); //Create new ext

what class type is m_FtFileName object of? is it the string class included in <string> or is it some other class and library?

Nelly · #7 04-May-2004, 02:01

#include <string>

CString m_m_FtFileName;

machinated · #8 04-May-2004, 09:52

i tried using #include<string> and then declaring a CString type, but my compiler can't find that type in the string header. If possible, upload all your source files, so i can compile them on my own compiler and get a clear picture.

Max Payne · #9 04-May-2004, 20:48

I believe that CString is only for VC++ user, and the header is not string.h.

Nelly,
I don't find any clues about your code, I mean where the problem might come from, so if your project is not big, you may post it for others to see. I may take a look at it hoping I can solve your problem.

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