@Marcos-Miguel said in How to remove ALL the duplicates WITHOUT deleting the empty lines?:
Very polite of you.
I was polite in my first response.
I probably should have redirected you to the FAQ section (which you should have read anyway before posting on any site new to you) where there is detailed instructions on how to ask such a question as yours.
And someone else was polite to you, but you ignored their request (“Can you provide an example of what your file structure looks like and how it should look at the end?”)