Thanks for the response! Strange that you don't get the same errors.
Yeah, I'm in the AFNI_data6/group_results directory when I run the command
tcsh -x s6.ttest.covary
that calls the script with the following settings:
3dttest++ -prefix stat.6.covary_ACM \
-AminusB \
-setA Vrel \
FP "OLSQ.FP.betas+tlrc.HEAD[Vrel#0_Coef]" \
FR "OLSQ.FR.betas+tlrc.HEAD[Vrel#0_Coef]" \
FT "OLSQ.FT.betas+tlrc.HEAD[Vrel#0_Coef]" \
FV "OLSQ.FV.betas+tlrc.HEAD[Vrel#0_Coef]" \
FX "OLSQ.FX.betas+tlrc.HEAD[Vrel#0_Coef]" \
GF "OLSQ.GF.betas+tlrc.HEAD[Vrel#0_Coef]" \
GG "OLSQ.GG.betas+tlrc.HEAD[Vrel#0_Coef]" \
GI "OLSQ.GI.betas+tlrc.HEAD[Vrel#0_Coef]" \
GK "OLSQ.GK.betas+tlrc.HEAD[Vrel#0_Coef]" \
GM "OLSQ.GM.betas+tlrc.HEAD[Vrel#0_Coef]" \
-setB Arel \
FP "OLSQ.FP.betas+tlrc.HEAD[Arel#0_Coef]" \
FR "OLSQ.FR.betas+tlrc.HEAD[Arel#0_Coef]" \
FT "OLSQ.FT.betas+tlrc.HEAD[Arel#0_Coef]" \
FV "OLSQ.FV.betas+tlrc.HEAD[Arel#0_Coef]" \
FX "OLSQ.FX.betas+tlrc.HEAD[Arel#0_Coef]" \
GF "OLSQ.GF.betas+tlrc.HEAD[Arel#0_Coef]" \
GG "OLSQ.GG.betas+tlrc.HEAD[Arel#0_Coef]" \
GI "OLSQ.GI.betas+tlrc.HEAD[Arel#0_Coef]" \
GK "OLSQ.GK.betas+tlrc.HEAD[Arel#0_Coef]" \
GM "OLSQ.GM.betas+tlrc.HEAD[Arel#0_Coef]" \
-paired -covariates covary.toe.gap.txt \
-ETAC -ETAC_blur 0 4 -ETAC_opt sid=1:hpow=0:name=test1:pthr=0.01/0.001/10:fpr=9 -mask mask+tlrc
and this results in the number of volumes error mentioned.