Disclaimer: I have almost no experience with Fortran, nor I'm needing this, but anyway (perhaps just as a reminder for you) :-)...
Provided that: 1) Open MPI exposes MPI_LOGICAL{1|2|4|8}, and they are not (AFAIK) listed in the MPI standard (I cannot found them in MPI-2.2) 2) The MPI-2.2 standard DO list MPI COMPLEX4 (at least in 2.2) ... would it make sense that you add MPI_COMPLEX4 support ASAP, even before full MPI-2.2 support? -- Lisandro Dalcín --------------- Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC) Instituto de Desarrollo Tecnológico para la Industria Química (INTEC) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) PTLC - Güemes 3450, (3000) Santa Fe, Argentina Tel/Fax: +54-(0)342-451.1594