You can use the PI process CosmeticCorrection for this, it is working very well for correcting a bad column on my CCD. Check out this video for an example of how to use it for correcting a bad column:
In the video it is used by loading the images to be corrected into that CosmeticCorrection tool. But if you use WBP for stacking your images there is a more convenient way of using it. First you enter the columns to be corrected into the CosmeticCorrection process, and then you save an instance of that onto the PI workspace. In my case I renamed the process icon to "CorrectBadColumn", and I saved it to my list of process icons that are loaded into the workspace each time PI launches. Then, in WBP you tick the "Apply" checkbox in the Cosmetic Correction section in the Lights tab, and you chose your process icon, in my case CorrectBadColumn, in the Template icon dropdownlist (see screen shot below). When you run WBP this process will be applied to all images.
It might appear a bit complicated at first sight, but when setup properly it only amounts to clicking Apply and select a process icon that is by default on my workspace.
Edited by Mika76, 11 April 2021 - 04:56 AM.