HDL: End date a record/Alter the Effective Start date through HDL

 If you just pass the EffectiveEndDate field in an HDL load to end date any component, it would create a date track entry. 

To end date a record completely you should also use ReplaceLastEffectiveEndDate field with value 'Y' 

Similarly to alter the EffectiveStartDate, you need to use ReplaceFirstEffectiveStartDate field with value 'Y'