Hi, the MPI standard version 3.0 misses a definition of the constant MPI_INTEGER_KIND. The constant is mentioned on page 15 and page 664, but it is neither used nor defined (even tough the definition is obvious). MPI standard version 2.2 had a definition of MPI_INTEGER_KIND in a subsection about the language interoperability of addresses, but this subsection seems to be gone. Best regards, Michael