Making payments of multiple operating units

Are you trying to make payment of invoices pertaining to multiple operating units having different transacting currencies??

Here is the list of what you need.
1. A bank with multiple currency flag enables. Similarly the check boxes of multi currency payments and multi currency receipts should be enabled.

2. A payment process profile with the payment format specified for the payable documents defined for the bank

3. Exchage rate type and rate defined for the foeign currencies

Transaction part.
1. Raise invoices intherespective OUs
2. create a payment process request via payment manager
3. generate payments