FIX 4.2 and ExecReportAck
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we have a counterparty that implement FIX 4.2 standard to send executionReport messages (35=8).

In their specifications, they need a message in order to check the correct transmission. The strange thing is taht the message type is "BN", that's not in 4.2 specs.

I've implemented a method in order to send such kind of message, and all works fine, but the quickfix put this message into the errorlog.

There is a way to tell quickfix to exclude from errorlog these "BN" messages?