The AltaView BM function does not appear to capture RT-RT messages.

When using AltaView BM function and message filtering, you MUST include the RT/SA for the RECEIVING RT in the filter for the messages to appear in the Bus Monitor.

If you filter for the TRANSMIT message, the RT-RT message will NOT be captured. This is because the filter mechanism looks at the FIRST command word to determine if a capture is filtered for.
In the case of an RT-RT message, the RECEIVE command appears first on the bus, followed by the TRANSMIT command.