Hi all, I am trying to install the Rmpi package in R and, while the installation itself works, it breaks down when trying to load the library. I think it has something to do with shared vs static loading of helper libraries, or the order in which shared libraries are loaded, but I am not sure. R version: 2.14.0 Linux version: Gentoo, i686-pc-linux-gnu (32-bit) GCC version: 4.5.3 (Gentoo 4.5.3-r1 p1.0) OpenMPI version: 1.5.4 Output from R CMD INSTALL . in Rmpi source directory: * installing to library ?/home/jos/R/i686-pc-linux-gnu-library/2.14? * installing *source* package ?Rmpi? ... checking for gcc... i686-pc-linux-gnu-gcc -std=gnu99 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 i686-pc-linux-gnu-gcc -std=gnu99 accepts -g... yes checking for i686-pc-linux-gnu-gcc -std=gnu99 option to accept ISO C89... none needed I am here /usr and it is OpenMPI Trying to find mpi.h ... Found in /usr/include Trying to find libmpi.so or libmpich.a ... Found libmpi in /usr/lib checking for openpty in -lutil... yes checking for main in -lpthread... yes configure: creating ./config.status config.status: creating src/Makevars ** Creating default NAMESPACE file ** libs make: Nothing to be done for `all'. installing to /home/jos/R/i686-pc-linux-gnu-library/2.14/Rmpi/libs ** R ** demo ** inst ** preparing package for lazy loading ** help *** installing help indices ** building package indices ... ** testing if installed package can be loaded /usr/lib/R/bin/exec/R: symbol lookup error: /usr/lib/openmpi/mca_paffinity_hwloc.so: undefined symbol: mca_base_param_reg_int ERROR: loading failed * removing ?/home/jos/R/i686-pc-linux-gnu-library/2.14/Rmpi? Any help would be greatly appreciated! Jos