For MM, part of the flows(called Current portion) like installment repayment can be handled seperately from the deal itself(different VC).
And it's archived by TPM15M.
It's provided via soft modifaction before (note 1515125 ) but the good news is it's released as standard functionality via note 1776554.
Steps in TPM15M(of course it must be avalilable which means one of the above 2 notes should be applied).
1, set the flag 'OTC transactions'
2, choose the option 'General Valuation Class' for the selection of the outgoing position
3, specify the general valuation class for CPLTD (as defined in customizing) as the target valuation class
then the parameter 'Horizon for Current Portion' can be specified (below the key date of the valuation class transfer) will be shown.
The system will then determine the amount which is scheduled to be repaid between the key date and the date 'Horizon of Current
Portion'. This amount can then be transfered from the current valuation class of the deal (generally long term) to the current portion of long term.
Main customizing:
table TRGC_COM_VALCL.
Path:
Transaction Manager
General Settings
Accounting
Settings for Position Management
Define and Assign Valuation Classes