[Freesurfer] optseq2

hello, i'm struggling with how to specify a schedule and then ask optseq2 to identify an optimal timing schedule. specifically i have a conditioned cue and an unconditioned stimulus. the high threat CS always needs to follow with a high pain US and low threat CS with a low pain CS. how can i specify such a schedule in optseq2? i've been trying a number of combinations of below, but am failing miserably with lots of varying warnings and error messages and inability to read files or 'Bus error'

what should the --in input schedule file format look like? that might be the missing link .. although that's hard to say for sure.

many thanks, claire