I have read some of the related topics and I found Bert's fix for the course needle rotation.  I added the missing 'dnor' entries but the course needle still only adjusts in one direction.

I have this in the AUTOPILOT_EMB300V4VC.xml file that is in the panel.gtn- EMB505.Gauge folder-

 

<!-- Autopilot knobs-->

<Update id="Autopilot_knobs">
    <Script>                
    
    
(L:H850XPCrs1WheelDN, number ) 0 >  if{
    1 (>L:BUFFER_BTN_DIM,number)
    
    (L:CUSTOM_AP_CRS1_KNOB, number) 6 - dnor
    (>L:CUSTOM_AP_CRS1_KNOB, number)
    (L:G1000_CDISource, enum) 1 ==
    if{  (A:NAV OBS:1,Degrees) --  dnor (>K:VOR1_SET) }
    (L:G1000_CDISource, enum) 2 ==
    if{  (A:NAV OBS:2,Degrees) --  dnor (>K:VOR2_SET) }
         0 (>L:G1000MFDCrsWheelDN, number )
    }        
    
    0 (>L:H850XPCrs1WheelDN, number )
}    
(L:H850XPCrs1WheelUP, number ) 0 >  if{
    1 (>L:BUFFER_BTN_DIM,number)

    (L:CUSTOM_AP_CRS1_KNOB, number) 6 + dnor
    (>L:CUSTOM_AP_CRS1_KNOB, number)
    (L:G1000_CDISource, enum) 1 ==
    if{ (A:NAV OBS:1,Degrees) ++  dnor (>K:VOR1_SET) }
    (L:G1000_CDISource, enum) 2 ==
    if{ (A:NAV OBS:2,Degrees) ++  dnor (>K:VOR2_SET) }
         0 (>L:G1000MFDCrsWheelUP, number )
    }
    
    0 (>L:H850XPCrs1WheelUP, number )

 

}
(L:H850XPCrs1WheelPUSH, number ) 0 >  if{
    1 (>L:BUFFER_BTN_FMC,number)

 

The 'down' rotation works. I imagine that I am missing something.  :wink:

 

Bill

 

 

Well, now I don't know if it working or not.     I just did an ILS approach into LAX on 24L and the course needle worked.  When I'm in GPS it doesn't move.  I think that I should be able to set the needle to the course that I'm on, but no go.