Files of labels need to be in .txt format.
There could be 2 cases:
+ the file has already been created, because in previous analysis or for other variables you decided to save the labels list. In this case Datadynamic saved the file in the correct format and layout and what you have to do is simply load the list (see this point c))
+ you need to create a file. In this case just open a new .txt file and the format is
and so on.
No spaces are allowed, like the example in the attached file (New countries.txt).