title: Application crashes says : Access violation reading location
body: <p>My application crashes after running for around 18 hours. I am not able to debug the point in the code where it actually crashes. I checked the call stack- it does not provide any information as such. The last few calls in the call stack are greyed out-meaning I cannot see the code of that part-they all belong to MFC libraries. </p>
  
  <p>However, I get this 'MicroSoft Visual Studio'  pop-up when it crashes which says :  </p>
  
  <p>Unhandled exception at 0x7c809e8a in NIMCAsst.exe: 0xC0000005:
  Access violation reading location 0x154c6000.</p>
  
  <p>Could the above information be useful to understand where it is crashing.Is there any software that could tell me a particular memory address is held by which variable in the code.  </p>