Description
For each categorical variable, the event must occur for each category. In other words, each category must have at least one record with the event indicator field equal to 1. For example, if a categorical variable has values red and blue, but all blue records have an event indicator equal to 0, this error will be returned.
Solution
Review other accompanying warning messages to determine the categorical variables and categories that do not have events. Either remove these categorical variables, or combine some categories so that all categories have at least one event.