711C "POSITION SOURCE ARE CHANGED" ERROR WITH TZT3

neversink2

New member
My 711C AP screen recently started flashing and beeping with the error message "position source are changed". The lat/lon on the AP controller also began flashing.
I tried clicking through the NMEA2000 PGN outputs and the error goes away if I turn 12906 COG & SOG, Rapid update to "off". However, this removes the data from the AP. While toggling the 12906 on/off, i also saw the error "speed source are changed". The AP has the PG700 compass as source 1 and the MFD as source 2 for external data.

The only recent change to my system was a new thru hull B275 LHW thru hull transducer which the MFD automatically recognized. How do I fix this so the AP still gets data from the MFD without the error message?

Thanks in advance.
 
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