SAP Message 5U143 - End date is before start date

Diagnosis
The benefit plan year that you have entered ends before it starts.

System Response
The system could not save the benefit plan year you specified.

Procedure
Enter from date and to dates that fall chronologically. Note that abenefit plan year can be any length of time and can begin and end atany time of year. It does not have to fall according to the calendaryear.