My approach would be to write a small C++ test function and main program against the C++ library you use, and run it in both 32 and 64 bit.
Without using R. You then know whether the difference you see is due to the library, or your R wrapping, which should give you an idea about where to make changes. Dirk -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel