How to read DICOMDIR file

Hi, I’ve got DTI data using Siemens 3T MRI scanner, and ti si DICOMDIR format. I use MiscroDIcom software to open it, and I get images from different series

and I want to transfer them into different DICOM files according to the series, which is the function of the software.
Then I used MrTrix3 to see the info of the dcm files using mrinfo. And I got this error:
So it seems like the MiscroDicom’s function is not perfect? Or something.
Anyone one knowes how to solve this? Any tools support my thought, you know, transfer the DICOMDIR to multiplt DICOM files