Hello friends. I've found what seems to me a bit of a bug:
Have a project with photos having lat, lon, alt, yaw, pitch, roll, already aligned.
Now have a GCP text file with names,X,Y,Z
When you import this file with OPK as rotation format option selected in the dialog, even with rotations import check disabled, it will force change project to OPK mode causing problems with the camera rotations.
In my opinion this dropdown option in the import dialog should be disabled unless the rotation import is checked.
Regards,
GEOBIT