Thank you, Gang.
I'm running Version AFNI_22.1.09 'Antoninus Pius'. I was able to get 3dMVM to run if I remove the within-subject factor but it does not work when I try to run a model with just the within-subject factor, so that seems to be the culprit. Is there something I'm missing? I'm pasting a simplified version of my command below:
3dMVM -prefix GroupAnalysisWS -jobs 9 \
-wsVars Session \
-SS_type 3 \
-num_glt 1 \
-gltLabel 1 PreVsPost -gltCode 1 'Session : 1*Pre -1*Post' \
-dataTable \
Subj Session InputFile \
000156_1 Pre /media/canlab/CANLABMRI/r61/r61ertt/first_level_analysis/2021_10_19_first_level/000156_1.results/stats.000156_1_REML+tlrc'[19]' \
000156_3 Post /media/canlab/CANLABMRI/r61/r61ertt/first_level_analysis/2021_10_19_first_level/000156_3.results/stats.000156_3_REML+tlrc'[19]' \
000178_1 Pre /media/canlab/CANLABMRI/r61/r61ertt/first_level_analysis/2021_10_19_first_level/000178_1.results/stats.000178_1_REML+tlrc'[19]' \
000178_3 Post /media/canlab/CANLABMRI/r61/r61ertt/first_level_analysis/2021_10_19_first_level/000178_3.results/stats.000178_3_REML+tlrc'[19]' \
000573_1 Pre /media/canlab/CANLABMRI/r61/r61ertt/first_level_analysis/2021_10_19_first_level/000573_1.results/stats.000573_1_REML+tlrc'[19]' \
000573_3 Post /media/canlab/CANLABMRI/r61/r61ertt/first_level_analysis/2021_10_19_first_level/000573_3.results/stats.000573_3_REML+tlrc'[19]'
