I'm working in the Mirth environment. I have identified a bug where acknowledgements from messages already processed will be lingering around when a new message arrives. The lingering ack will then be treated as an ack for the new message.
Hopefully the bug will be fixed in an upcoming version of Mirth, but in the meantime, I'm trying to work around it.
I'm looking for a way to use the preprocessor (Javascript, or Javascript calling Mirth Java objects) to clear any lingering acks before processing the next message.