I'll try a new model. My problem is that I have a lot of runs that don't have any errors in them. I've been using a single timing file for each regressor in which each line represents a run (there are 8 runs in my experiment, so each timing file has 8 lines). How can I set up my error stim files so even when no errors occur, 3ddeconvolve is able to track with the correct run?