Simrad TP32 and Opencpn errors

[George64]

Hello,

Setup for OpenCPN is autopilot on Com6 and AIS + GPS on Com9. To get the route info from Opencpn on my Clipper GPS repeater outside, it is connected via an input on the multiplexer. The output from the multiplexer goes to the Clipper display and the AP.

When an active route is set, the AP can not steer to wind. It errors after a minute or so. If I switch of Opencpn the AP steers to wind withput erroring.

I assume that some NMEA-string is confusing the AP. I already spent hours and hours in figuring out what can be a possible solution, however haven't found one. Anybody who can come up with a solution?

Many thanks,
George