To bring closure to this thread, we found that the following simple patch to
Rmpi/src/Rmpi.c fixes the problem:
@@ -63,7 +63,7 @@
- dlopen("libmpi.so.0", RTLD_GLOBAL);
+ dlopen("libmpi.so.0", RTLD_GLOBAL | RTLD_LAZY);
The fix has been applied to Debian's package and should also be forthcoming
in future releases of Rmpi. Big thanks to Jeff Squyres for patient help with
Three out of two people have difficulties with fractions.