Not able to import a list of topics to make en index. The files with the list are grayed out.
I am using InDesign CC 2017 on a Mac with Sierra. I want to make an Index in a book I am making, and have a list of topics. But InDesign does not recognize the files with the list in all formats I have tried. I have done it in older versions of InDesign, but not able to do it now. The manual for InDesign just says select Impot Topics and the file with the topic. But I am not able to do it.


