Hi all,

I am new to conn and am at my wits end. I keep getting this error during the ROI extraction (step 5/7) after preprocessing: Error using rex>rex_do mismatched number of scans and covariate datapoints ([3 1] vs. [180 8])

I am using a custom atlas but I've checked it a million times and everything seems correct. This happens even when I start from scratch with just one subject. The data is structurally sound and preprocessing completes without errors. I can verify that the subject has 180 volumes and a TR of 2.3s, entered correctly. I’ve tested this error with both a custom multi-label ROI atlas (verified in FSL and SPM, 0–48 integer labels) and with individual binary ROI masks— i'm getting the same error in all cases. The error suggests a mismatch between the number of scans (180) and the covariates (only 1 row?)

Any help would be greatly appreciated! 

Thanks