--------------------------- 
 Microsoft Visual C++ Debug Library 
 --------------------------- 
 Debug Assertion Failed! 
  
 Program: ... 
 File: C:\Program Files\Microsoft Visual Studio 8\VC\include\xtree 
 Line: 370 
  
 Expression: map/set iterator not incrementable 
  
 For information on how your program can cause an assertion 
 failure, see the Visual C++ documentation on asserts. 
  
 (Press Retry to debug the application) 
 --------------------------- 
 Abort   Retry   Ignore    
 ---------------------------