Using Sankey Diagram

[DavidPhillips2]

I read the documentation on Sankey Diagrams and my output displays no data to display.  My variables are

Event: Current university (list of schools the student is attending)

Sequence Order: Year count (the number of years since the start)

Transaction identifier: Cohort the year the student started with the university.

I was expecting the Sankey diagram to populate am I missing something?

[DavidPhillips2 · Accepted solution]

Apparently you need to use a date or a number to track time.  There should be a message in the interface about this.