: Verify that the head model and sensor array use the same coordinate system (e.g., MNI or CTF).
: If running a surface analysis, check for errors where covariate dimensions (like realignment parameters) do not match the number of functional scans. HM_SPM.rar
Are you planning to use this model for or EEG source localization? Artifact Detection Tools (ART): help - NITRC : Verify that the head model and sensor