Thank you! Well, that was my first guess, but this issue does not appear if the images are processed in FlexColor.
How do you delete the calibration files?
this columns errors cant be "repaired", but they are mapped out by the manufactors. so a repair is to create a new map.
it could be in your case that the mapping file is interpretated well by flexcolor but not by phocus.
nearly all sensors have many many dead pixels and one two or more lines which arent working.
these pixels and columns are than mapped out with a file which is telling which line doesnt work and which neighbour line or pixel should be used twice.