Partial Cancellation of Currency Options (Prod. type 76A)

Dear All,

In standard, we have termination options functionality to close the currency option prior to expiry date with full position but there is a requirement to cancel a European currency option partially before expiry date and not the total position of the deal..

How do I take care above requirements in SAP system?

Thanks in advance for your help..

Regards,

Abhishek