No reads using demux on version 2019.10

Yep! My point is that there are some questions you need to ask your sequencing center in order to get a handle on the data. The first thing to confirm is whether or not your barcodes are Golay barcodes (you mentioned in your post you used EMP barcodes, which should be Golay barcodes, but worth double-checking).

Please see these posts for discussion of the things that should get sorted out in the discussion with the sequencing center:

Hope that helps.