Hello I have encountered some problem in R 1-8-1 installation. The compilation run smoothly (make) but the (make) check step fails at the reg-tests-1.R step It is said that (at the end of reg-tests-1.Rout.fail) library(mva) ## cmdscale ## failed in versions <= 1.4.0 : data(eurodist) cm1 <- cmdscale(eurodist, k=1, add=TRUE, x.ret = TRUE) cmdsE <- cmdscale(eurodist, k=20, add = TRUE, eig = TRUE, x.ret = TRUE) stopifnot(identical(cm1$x, cmdsE$x), identical(cm1$ac, cmdsE$ac)) failed When I rerun the test without cleaning anything, the "make check" pass the reg-test and all the subsequent one. When I manually run the portion of the test it succeeds. <topbuiddir>/bin/R --vanilla When I clean everything, rerun configure without ATLAS library rerun make and make check everything run smoothly including all test. Atlas library passed all its tests and it was built with P4 arch and thread support enabled What does it means ? Some specifications I have a dual Xeon 2.4 Ghz with Linux Suse 9.0 : kernel, gcc and make version 2.4.21-99-smp gcc (GCC) 3.3.1 (SuSE Linux) GNU Make 3.80 Rversion : R-1.8.1 Atlas version 3.6.0 Thanks Pierre-Andre Cornillon