I have a model that worked successfully on flowsim a few weeks ago, but not now. Mesh generation has taken a week (previously just hours) and the CPU appear to be idle most of the time and every few hours it would max out for a few seconds and go back to idle again for hours. I am using a MSI GT60 workstation with an i7, Quadro and 16GB. I have tried recreating the model from scratch (in case the file was corrupt) but that did not help. What I can try?