Hello Francois, I am having similar issues with OpenMEEG. I have attempted to run a head model on some MEG data with every variable possible and it either runs indefinitely without finish or terminates due to ‘om_gain’ error. Is there any way this will be resolved within the next two weeks? I must give a presentation for my internship at the NIH in two weeks and am relying on this software. If this is not possible do you recommend any other solution for generating a head model. For now I may simply use the overlapping spheres method.Thank you.