Hi all, i'm having this error when configuring the latest petsc-dev on an IBM PPC system. TESTING: CxxMPICheck from config.packages.MPI(/gpfs/h01/vkampenh/install/petsc-dev/config/BuildSystem/config/packages/MPI.py:611) ******************************************************************************* UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log for details): ------------------------------------------------------------------------------- C++ error! mpi.h could not be located at: [] ******************************************************************************* My configure options: ./configure --with-batch=1 --with-mpi-shared=0 --with-endian=big --with-memcmp-ok --sizeof-void-p=8 --sizeof-char=1 --sizeof-short=2 --sizeof-int=4 --sizeof-long=8 --sizeof-size-t=8 --sizeof-long-long=8 --sizeof-float=4 --sizeof-double=8 --bits-per-byte=8 --sizeof-MPI-Comm=8 --sizeof-MPI-Fint=4 --have-mpi-long-double=1 --with-f90-interface=rs6000 --with-cc="mpcc -compiler xlc_r -q64" --with-fc="mpfort -compiler xlf_r -q64" --FFLAGS="-O3 -qhot -qstrict -qarch=auto -qtune=auto" --CFLAGS="-O3 -qhot -qstrict -qarch=auto -qtune=auto" --LIBS=-lmass_64 --with-ar=/usr/bin/ar --prefix=/sara/sw/petsc/3.0.0-p8/real --with-scalar-type=real PETSC_ARCH=linux-ibm-pwr6-xlf-real-64 --with-shared=0 -with-debugging=0 --download-ml --download-hypre vkampenh@p6012:~/install/petsc-dev> module list Currently Loaded Modulefiles: 1) compilerwrappers/yes 4) c++/ibm/11.1 7) upc/ibm/11.1 2) java/ibm/1.5 5) fortran/ibm/13.1 3) c/ibm/11.1 6) sara vkampenh@p6012:~/install/petsc-dev> locate mpi.h /opt/ibm/java2-ppc64-50/include/jvmpi.h /opt/ibmhpc/ppe.poe/include/ibmmpi/mpi.h /opt/mpich/include/mpi.h /usr/include/boost/mpi.hpp /usr/lib64/gcc/powerpc64-suse-linux/4.3/include/jvmpi.h /usr/lib64/mpi/gcc/openmpi/include/mpi.h /usr/lib64/mpi/gcc/openmpi/include/openmpi/ompi/mpi/f77/prototypes_mpi.h /usr/src/linux-2.6.32.27-0.2-obj/ppc64/default/include/config/usb/serial/siemens/mpi.h /usr/src/linux-2.6.32.27-0.2-obj/ppc64/ppc64/include/config/usb/serial/siemens/mpi.h /usr/src/linux-2.6.32.27-0.2-obj/ppc64/trace/include/config/usb/serial/siemens/mpi.h /usr/src/linux-2.6.32.27-0.2/drivers/message/fusion/lsi/mpi.h Is there an easy way to add the IBMHPC/PPE.POE directory to the configure list, so that it will be recognized? The machine uses LoadLeveler schedule system, which handles the MPI settings. Thanks, Leo