Loading images Error

[Nhơn Trần]

Hi everybody.

I have a few question.

1/ when i run dirart at Matlab command line occurs position value as image 1, what is the value corresponding?

2/ I load image from matlab.mat file, a Enter voxel size window appear as image 2, what are the numbers i must text into blank? How to get the numbers?

3/ what is the errors as image 3? How to fix its?

Thanks and best Regards.