A really weird thing happening

[Fumozzo]

I use Visual C++ and I have this code as a member function of a class I created:

ifstream DatFile("C:\\analize.dat");
DatFile.get(m_AppPath,100);
DatFile.close(); 

In the analize.dat file there is a path to an application and m_AppPath is an array of 100 char.

The problem is that the program works well when I compile it in the Debug mode, but give me a system error when I run the version compiled in release mode.

The program compiled in the release mode works well if I assign directly a value to m_AppPath, for example:

ifstream DatFile("C:\\analize.dat");
DatFile.get(m_AppPath,100);
DatFile.close();
m_AppPath="C:\\dir\\app.exe"; 

Does someone know why the first code work only in debug mode ?
Thanx