Hi everyone, I'm using optseq2 and a tnullmin of 2 seconds to force 2 seconds between each event for my paradigm, but I get a "segmentation fault" error. Here's my command line below. I didn't specify a tnullmax, so that I would avoid any errors by specifying both. I tried other values for tnullmin like 1, which did work and 1.5, which also did not work. Ideally, the paradigm I would like to model listed in a paper that fixation was jittered 2-10 seconds between stimuli, but 2 seconds does not work for me. Do you know why this might be? Thanks.

optseq2 --nsearch 1000 --nkeep 2 --pctupdate 10 --ntp 86 --tr 2 --psdwin 0 12 0.5 --ev emotion 0.5 60 --ev calm 0.5 26 --tnullmin 2 --cost eff --o emotion

INFO: Setting srand48() seed to 345330

optseq2

$Id: optseq2.c,v 2.21.2.1 2011/04/21 19:50:06 greve Exp $ NoSearch  = 0 nSearch  = 1000

nKeep    = 2

PctUpdate  = 10.000000

nCB1Opt  = 0

seed     = 345330

Ntp  = 86

TR   = 2

TPreScan   = 0

PSD Window   = 0 12 0.5

nEvTypes = 2

EvNo    Label Duration nRepsNom

1    emotion  0.500   60

2       calm  0.500   26

PctVarEvReps = 0

VarEvRepsPerCond = 0

PolyOrder = -1

tNullMax = -1

tNullMin = 2

outstem = emotion

AR1 = 0

No refractory penalty

Cost = eff

OutStem = emotion

Summary File = emotion.sum

nTaskAvgs = 48

INFO: LogFile is emotion.log

outstem = emotion

Segmentation fault

-Anita