Hi, Everyone, WE have R 2.2.0 installed on linux (federo), and lam/mpi installed under /usr/local/lam-7.1.2, installed Rmpi_0.5-2 without an error. But when try to load the library get error as below: > library("Rmpi") Error in dyn.load(x, as.logical(local), as.logical(now)) : unable to load shared library '/usr/local/lib64/R/library/Rmpi/libs/Rmpi.so': libmpi.so.0: cannot open shared object file: No such file or directory Error in library("Rmpi") : .First.lib failed for 'Rmpi' Error in dyn.unload(x) : dynamic/shared library '/usr/local/lib64/R/library/Rmpi/libs/Rmpi.so' was not loaded > system("echo $PATH") /usr/local/lam-7.1.2/bin:/usr/local/lam-7.1.2/bin:/usr/local/pdsh/bin: /usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/opt/c3- 4/:/usr/local/mcm:/usr/local/moab/bin:/usr/local/moab/sbin:/opt/moab:/ usr/local/pbs/bin:/usr/local/pbs/sbin:/home/binye/bin > system("ls /usr/local/lam-7.1.2/lib") lam liblamf77mpi.so.0.0.0 liblammpi++.so.0 libmpi.la liblam.a liblam.la liblammpi++.so.0.0.0 libmpi.so liblamf77mpi.a liblammpi++.a liblam.so libmpi.so.0 liblamf77mpi.la liblammpi++.la liblam.so.0 libmpi.so.0.0.0 liblamf77mpi.so liblammpio.a liblam.so.0.0.0 liblamf77mpi.so.0 liblammpi++.so libmpi.a The libmpi.so.0 is there, and the path is correct, why Rmpi can't find libmpi.so.0? Thanks a lot in advance! Bin