Hi Antonio,
I still think that 1/1/2014 is not the right choice for the migration posting date. Already to ensure consistency between the G/L account balances and all subledger accounts, all accounting transactional data should be as per the same day, as a result of a trial balance of that day.
Can you give more details why not taking 31/12/2014 as migration posting date? Is it only about month end balance comparison for the 2014 periods, or are there additional reasons?
Regards
Michael