Hello Renatas,
Simple Scenario is:
For an "Intercompany Loan" Instrument with 4 months freq. Chronology given below:
Last Payment/ Capitalization Date = 5/31/2014 (Position/Principle Balance = 1mm)
Legacy/Excel based Interest Accrual on 6/30/2014 = 1k
Legacy/Excel based Interest Accrual on 7/31/2014 = 1k
SAP Go-live Date = 7/31/2014
On 7/31, Performed TBB1_LC with Position Principle as of 5/31/2014 (1mm) with Position Posting Date = 5/31/2014 (no posting in SAP)
On 7/31, Above 2 Accruals posted to new SAP GL Account on 7/31 (general journal, not via TR)
But to proceed further, how to statistically post Legacy/Excel based Interest Accrual on 6/30 & 7/31 like we did in TBB1_LC.
Please note postings to previous periods are not possible as they have been closed and have been posted manually accounting wise from excel.
SAP based Interest Accrual on 8/31/2014 = 1k (posted in SAP)
SAP based Interest Accrual on 9/30/2014 = 1k (posted in SAP)
On 9/31 Interest Capitalization Date = New Principle = 1mm + all total interest accruals which will be the correct cash flow indicated by SAP.
Please note that the loan instruments are denominated in different currencies than CoCd currencies hence there are forex gain/loss issues too.
Regards,
Rahul