This clarification is needed in the MPI-1 description of MPI_TYPE_SIZE, since the issue repeatedly arises. It is a clarification of the binding.
 
 
 
 Advice to users.  
 
  
The  MPI-1 Standard specifies that the output argument of  
 MPI_TYPE_SIZE in C is of type  int. The  MPI Forum  
considered proposals to change this and decided to reiterate the original  
decision.  
  
 ( End of advice to users.)