Hi Stam,
Thank you for your response. The WLS option fails mainly at some extreme slices. In my dataset I had failures in less than 0.1 % of all slices processed. But it is likely a single voxel caused the error within that slice. The OLS option returns no error for all slices.
I'm unable to locate the particular voxel where the fitting failure occurred as I see only the particular slice at which the failure occurred on the console output.
Thank you,
Jim.
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