afni.nimh.nih.gov

Heather,

Option GOFORIT is only a band-aid. The fundamental question is, why do you have the collinearity problem? Is it because of some identical regressors (by mistake) or something else? If you're not so sure, add option -x1D so that you can use program such as ExamineXmat or xmat_tool.py to check the design matrix.

Gang