I have a field for time and I want to put this variable on the pages shelf but I want to show it in 15 time intervals (on a 24 hour clock). Right or wrong I created groups to make 76 some odd groups (not all times are represented in my data). When I try to put it on the shelf I get an error saying Tableau had an error connecting to the database (a live spreadsheet). I then made less groups in 1/2 hour increments and had no problem. I am assuming that the reason was the number of groups. Does anyone know what the limit is (if there is one)?