Hi there, I'm rather confused as to why this is happening. The design matrix looks fine, and I'm pretty sure I'm not actually running out of memory here - as it seems to be prior to film_gls doing anything substantial. Any ideas? I have auto-generated the feat file, but it loads fine and looks right in the Feat gui, and I've used the version that I saved after viewing in Feat, same problem. I attached the fslerrorreport output and my fsf file. Thanks! Dav