RFC seems to make implicit commit ?!

Hi,

when I call an RFC I see that after the call to the RFC returns everything has been committed to the database. This is not the desired behavior. I want to call several RFCs in a row and then send BAPI_TRANSACTION_COMMIT or BAPI_TRANSACTION_ROLLBACK.

Does anybody know whether this can be done at all and if so how?

Regards, Oliver Plohmann