Digital Light & Color

This type of problem is a bug in PWP that can show up if you choose too large a font size in the Display control panel.

This error message indicates that the light falloff curve is very uneven and cannot be accurately modeled. Make sure the white card is evenly lit and that you expose it so none of the channels is clipped and nothing is obscuring part of the field of view (e.g. a filter cutting off the corners of the...

You have an sRGB image converted to the Chrome color space as if you had used Transformation/Color/Change Profile

First make sure the images have the lightest patches on the left and the darkest on the right. This may require using Transformation/Geometry/Mirror/Rotate. The error you mentioned occurs if the darkest patch of the first image is brighter than the darkest patch of the normal image or the darkest pa...

This message indicates a problem with the video drivers not supporting color lookup tables for some reason - possibly because you are not running as an Administrator? Other than looking for more recent drivers to download I'm not sure what else to try.

If you changed video drivers you would need to recalibrate your display.

Yes

The huge problem with Lab is that it is very easy to create out of gamut or even physically unrealizable colors such as really bright blues. HSL is the closest equivalent in PWP and does not have this problem.

This method does not make the darkest patch pure black or the lightest patch pure white. Using the file is the recommended method.

PWP remembers the last monitor curves