Hello, I'm not sure this is doable but I'm having trouble running my R script with multithreaded capability. With 16x2.93Ghz CPUs available, only one is running with 100%. Any suggestions? Thanks, Bing My system configuration is: egenera virtual machine running Linux Red Hat Enterprise Linux Server release 5.1 (Tikanga) 16x2.93GHz CUPs 99G memory