A small windows-specific issue, it seems like drag and drop does not work in mrview (RC2 and RC3) due to an additional “/” in front of the file specifier (e.g. “/C:/pathtofile/file.nii.gz”) leads to “error opening image…”
However, I can easily load the file via the Open-dialog.
Thanks for reporting! I’ve created an issue on Github for it, hopefully we’ll find time to look into it in the not too distant future…