Invalid effective date...

 
 
Error:
Invalid effective date. Date has to be formatted 'yyyymmdd'; for example '20100228'.
 
Explanation:
Dates should be entered in the order year - month - day (YYYYYMMDD). Any other way of entering causes this error message.
 
 
Solution:
Check that all dates are in YYYYYMMDD format and correct the incorrectly noted dates.