When I pull in a tab delimited text file it automatically recognises it as fixed width. At this stage it has the correct number of rows (570,227 in my case). However, when I change the file type to delimited text, although it now picks up the columns correctly, the row count drops to 512,217. I’ve tried unticking ‘has header’, ‘trim whitespace’ etc, but it makes no difference.
This happens on lots of different tab delimited files I’m using, so it’s not a one off.