Qdec and 3 groups GLM

I have a single factor with three levels (diagnosis) and trying to setup qdec, but I get the following message – I have a .levels file with all 3 groups specified – the contrasts are not getting generated automatically.

Data table loading completed successfully.
SUBJECTS_DIR is '/Volumes/FREECOM/Applications/freesurfer/subjects/conn'
ERROR: QdecGlmDesign::GenerateContrasts: factor 1 must have 2 levels
ninputs = 87
Checking inputs
nframestot = 87
Allocing output
Done allocing
nframes = 87
Writing to /Volumes/FREECOM/Applications/freesurfer/subjects/conn/qdec/Untitled/y.mgh
gdfReadHeader: reading /Volumes/FREECOM/Applications/freesurfer/subjects/conn/qdec/Untitled/qdec.fsgd
INFO: gd2mtx_method is dods
Reading source surface /Volumes/FREECOM/Applications/freesurfer/subjects/conn/fsaverage/surf/lh.white
ERROR: no contrasts specified.
Error in Analyze: command failed: mri_glmfit --y /Volumes/FREECOM/Applications/freesurfer/subjects/conn/qdec/Untitled/y.mgh --fsgd /Volumes/FREECOM/Applications/freesurfer/subjects/conn/qdec/Untitled/qdec.fsgd dods --glmdir /Volumes/FREECOM/Applications/freesurfer/subjects/conn/qdec/Untitled --surf fsaverage lh --label /Volumes/FREECOM/Applications/freesurfer/subjects/conn/fsaverage/label/lh.aparc.label

Any help?
Thanks
Lena
________________________________
Lena Palaniyappan
Clinical Lecturer & Honorary StR | Division of Psychiatry ( University of Nottingham)
South Block 'A' floor| Queens Medical Centre | Nottingham | NG7 2UH

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