Dear R People: Here are my latest attempts for Rmpi: This is the list of locations for mpi.h: /home/faculty/hodgess/mpich2-1.0.5p4/src/include/mpi.h /home/faculty/hodgess/include/mpi.h /home/faculty/hodgess/lam-7.1.4/romio/adio/sgi/mpi3.1/mpi.h /home/faculty/hodgess/lam-7.1.4/share/include/mpi.h /usr/src/linux-2.4.21-20.EL/drivers/addon/fusion_20505/lsi/mpi.h /usr/src/linux-2.4.21-20.EL/drivers/addon/fusion_20511/lsi/mpi.h /usr/src/linux-2.4.21-20.EL/drivers/message/fusion/lsi/mpi.h I tried to add the mpi to my path: [hodgess at gator bin]$ PATH=/home/faculty/hodgess/mpich2-1.0.5p4:$PATH [hodgess at gator bin]$ Now Install: [hodgess at gator bin]$ ./R CMD INSTALL Rmpi_0.5-4.tar.gz * Installing to library '/home/faculty/hodgess/R-2.6.0/library' * Installing *source* package 'Rmpi' ... checking for gcc... gcc checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking how to run the C preprocessor... gcc -E checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking mpi.h usability... no checking mpi.h presence... no checking for mpi.h... no Try to find libmpi or libmpich ... checking for main in -lmpi... no libmpi not found. exiting... ERROR: configuration failed for package 'Rmpi' ** Removing '/home/faculty/hodgess/R-2.6.0/library/Rmpi' [hodgess at gator bin]$ This is on a Linux Red Hat ent 3. Thanks, Erin mailto: hodgess at gator.uhd.edu