Dear all,

I am running into a persistent issue with SDM‑PSI. In my installation of version 6.23 (64‑bit), all mask files in the "share" folder (e.g. mask_gm.nii.gz, mask_brain.nii.gz, cor_2mm/4mm/6mm, indexes_2mm/4mm/6mm) are empty (0 KB). As a result, every preprocessing step produces empty .nii.gz output files. 

I have already:
- Re‑downloaded the package several times
- Unblocked the ZIP before extraction
- Extracted with 7‑Zip to a simple local path
- Tried version 5.15 and 6.11 as well

In all cases, the mask files remain 0 KB. The log file does not show any explicit error, but the outputs are unusable.

I understand that version 6.21 contained working masks and is considered more stable. Unfortunately, I cannot find a download link for 6.21 on the official website (only 6.23 and 6.11 are available).

Could anyone please:
1. Share a working copy of the mask files from the "share" folder, or
2. Point me to a download link for SDM‑PSI 6.21?

Many thanks in advance for your help.