Hello Freesurfer experts,

 

I am attempting to run the command

mri_glmfit --y lh.RBS_ADRC_N0_control.10.mgh --fsgd RBS_ADRC_APOE_age22.fsgd dods --C APOE_ageINT.mtx  --surf fsaverage lh --cortex --glmdir lh.RBS_ADRC_N0.glmdir

 

On this .fsgd file:

“RBS_ADRC_APOE_age22.txt”

 

Using the following design matrix:

 

“lh.RBS_ADRC_N0.txt”

 

I am receiving the error message:

--------------------------------

ERROR: matrix is ill-conditioned or badly scaled, condno = 1e+08

--------------------------------

Possible problem with experimental design:

Check for duplicate entries and/or lack of range of

continuous variables within a class.

 

I would appreciate your insights into what may be the likely cause of this error and apologize that the files are in text format. If need be, I can convert these to their proper formats.

 

misc information:

Freesurfer 6.00

CentOS v7

 

 

Best,

Curtis