Hey there. So I've never had this happen in the three years I've used XLights, but for some reason the T is not inputting timing marks, thus I can complete new songs for our show. I'm using an older version for the 2018 version I updated too had some major crash bugs, and I didn't have time to figure these out right now, so I'm just using the 2016.47 version, but I did test this in ALL versions, and the same thing is occurring. Is there a corrupt file of some sort we need to fix? Thanks in advance.