Problem with ligatures (liga > dlig)

Getting error notifications I cannot get my head around:
I have a list of ‘CODE LIGATURES’ in info > prefix. I changed some of them from .liga to .dlig – after clicking ‘test’ it (via button in info) notifies me that something in ‘Uppercase’ is wrong. How can that be?

Do I need to split the CODE LIGATURES into two? Help!! THX!

The place where something is wrong is sometimes not correct. So you need to carefully read the error message and fine the code yourself.

:confused: THX anyway