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We are running FSL 4.0.4 on a Mac Pro with a dual quad core (i.e. 8 processors) and would like to speed up the bedpostx processing by running it on several processors in parallel. The "Parallelising bedpost" link from the bedpostx documentation describes how to set a number of environment variables; we did this, and verified that the variables had the desired values, but when we ran bedpostx it only ran on a single processor. When looking elsewhere in the FSL documentation it mentions using a Sun Grid Engine (SGE) for running a number of FSL tasks (including bedpost), so does bedpostx require the SGE to be installed or does it use a different mechanism for doing the parallel processing? Also, has anyone has managed to bedpostx to run in parallel on a Mac without using the SGE and if so did they make any changes other than those described in the documentation? Thanks, Richard -------------------------------------------- Richard Jones Dept. of Radiology, Children's Healthcare of Atlanta, 1001 Johnson Ferry Road, Atlanta. GA 30342 USA. Phone 404 785 5381