Dear Alfonso,

I am very new to CONN, so I am first trying to learn and test CONN for case-control study before and go further for large data set. I preprocessed fMRI data of 2 subjects (1 for case and 1 for control) and defined the 2nd level covariate in the set up step as following:

- Covariate name: Case
Values [1 0]
- Covariate name: Control
Values [0 1]

After denoising and 1st level analysis steps, when I click on 2nd level analysis, it gives me following error:

Warning: Returning NaN for out of range arguments
> In spm_Tcdf at 91
In conn_glm at 85
In conn_process at 3416
In conn_process at 33
In conn at 4569
In conn_menumanager at 109
 and so on .... so on..

So it doesn't even let me to set between subject contrast as [-1 1] or [1 -1].

Thanks much Alfonso.