Maybe your mask is not a binary mask.
On 4/21/2010 2:10 PM, Fred Sanders wrote:
> Dear SPM experts,
>
> When using an explicit mask with a 2nd level analysis, I get an error
> during the model estimation step - the error states "No significant
> voxels." I only get this error when I use an explicit mask. Without
> the mask, the model estimation works fine. Looking thru other posts,
> it looks like other users have had a similar problem, but I could not
> find any solutions (outside of making sure my SPM8 has the most recent
> updates, which it does.) Any suggestions?
>
> Thanks!!
>
> Fred
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