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visual c++ mfc mdi Access violation reading location 0x000fc2f0

Answer 1

A:

debugger points me to that code

i got the message "TYPE not found"

CArray::~CArray() { ASSERT_VALID(this);

  if (m_pData != NULL)
  {
      for( int i = 0; i < m_nSize; i++ )
          (m_pData + i)->~TYPE();
      delete[] (BYTE*)m_pData;
  }
}

what code u want to see exactly?

forgot to mention that if i open an empty document closing is working fine as well

joe 2010-07-03 09:00:17

Why are you explicitly calling the destructor, then deleting it as BYTE-pointer? I suppose that the delete of the BYTE-pointer does not execute the destructor again? If it does this, your destructor is executed twice and this can explain your crash (you should verify this). A better way of writing this is just to "delete[] m_pData". This will call the destructor of all the instances in your array, and free the memory.

Patrick 2010-07-03 20:30:28

that code is not mine is the carray destructor in afxtempl.h.i post it to show where the problem occurs

joe 2010-07-04 07:45:38

That posted code is fine: this is the use of an in-place destructor to call the destructor for TYPE, then the delete[] cleans up the memory. This allows the CArray object to manage the memory for the underlying array as one block.

DavidK 2010-07-09 14:40:57

At which line in this does the debugger point you? The assertion, or something below it?

DavidK 2010-07-09 14:41:30

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visual c++ mfc mdi Access violation reading location 0x000fc2f0

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