Dear All, I've lunched the invwarp process approximately 120 hours ago.. *and it hasn't finished yet*.. I read on the fsl-fnirt page that this process could be "quite computationally intensive, and may take quite long to run".. but I didn't think it could take this much time.. Since FNIRT finished in not more than 30 hours, I was thinking something went wrong.. Any suggestion? All the best Dr. Alessio Moscato, Medical Physicist Medical Physics Dep., Niguarda Ca' Granda Hospital Milan, Italy