I am running Debian Etch on a dual Xeon 64 bit Dell Precision with the latest versions of R and RandomFields. I am unable to run the first example in ?GaussRF (in RandomFields). The bug occurs when GaussRF runs the line error <- InitSimulateRF(x = x, y = y, z = z, T = T, grid = grid, model = model, param = param, trend trend, method = method, register = register, gridtriple = gridtriple, distribution = "Gauss") This line crashes down the R session with the message "Illegal Instruction". I re-started R using R -d gdb and retried the example, the crash message was now Program received signal SIGILL, Illegal instruction. 0x00002aaaab31d6af in ATL_dJIK56x56x56TN56x56x0_a1_b0 () from /usr/lib/atlas/libblas.so.3 I then reinstalled atlas3-base, refblas3, and lapack3 from the sid repository. But this failled to improve matters. What should I try next? David