Gps displays some Vars, not others. Why?

[rpmc]

I can make use of fs9gps variables within the XML code of the gauge I’m building…but I can’t always display the fs9gps variables directly and I need some help figuring out why.

Here’s an example:

<Gauge Name="GPS display Question" Version="1.0">
	<Size X="400" Y="1000" />
	
	<Macro Name="c">C:fs9gps</Macro>
	<Macro Name="g">C:fs9gps</Macro>

	<Update>
	(@c:FlightPlanWaypointRemainingTotalDistance,nmiles) (>L:DistanceToDestination,nmiles)
	</Update>
	
	<Element>
		<Position X="10" Y="10"/>
		<Text X="732" Y="15" Bright="Yes" Length="61" Font="Arial" Color="White" Adjust="Center" VerticalAdjust="Center" Multiline="No" Fixed="Yes">
			<String>%((@c:FlightPlanDepartureAirportIdent))%!10s!%(' @c:FlightPlanDepartureAirportIdent')%!-50s!</String>
		</Text>
	</Element>
	
	<Element>
		<Position X="10" Y="28"/>
		<Text X="732" Y="15" Bright="Yes" Length="61" Font="Arial" Color="White" Adjust="Center" VerticalAdjust="Center" Multiline="No" Fixed="Yes">
			<String>%((@c:FlightPlanWaypointsNumber,number))%!10.2f!%(' @c:FlightPlanWaypointsNumber')%!-50s!</String>
		</Text>
	</Element>
	
	<Element>
		<Position X="10" Y="46"/>
		<Text X="732" Y="15" Bright="Yes" Length="61" Font="Arial" Color="White" Adjust="Center" VerticalAdjust="Center" Multiline="No" Fixed="Yes">
			<String>%((@c:FlightPlanWaypointRemainingTotalDistance,nmiles))%!10.2f!%(' @c:FlightPlanWaypointRemainingTotalDistance')%!-50s!</String>
		</Text>
	</Element>
	
	<Element>
		<Position X="10" Y="64"/>
		<Text X="732" Y="15" Bright="Yes" Length="61" Font="Arial" Color="White" Adjust="Center" VerticalAdjust="Center" Multiline="No" Fixed="Yes">
			<String>%((L:DistanceToDestination,nmiles))%!10.2f!%(' L:DistanceToDestination')%!-50s!</String>
		</Text>
	</Element>
</Gauge>

The following is displayed on my screen:

PHHN C:fs9gps:FlightPlanDepartureAirportIdent
7.00 C:fs9gps:FlightPlanWaypointsNumber
0.00 C:fs9gps:FlightPlanWaypointRemainingTotalDistance
54.71 ListanceToDestination

Everything appears correct except the third value, FlightPlanWaypointRemainingTotalDistance. Note that ListanceToDestination gets its value directly from FlightPlanWaypointRemainingTotalDistance and 54.71 is the correct number.

But, why the 0.00 display for FlightPlanWaypointRemainingTotalDistance?

I’m missing something simple but I don’t know what it is. Suggestions?

rpmc

 

[n4gix]

The @c is a macro call. The expression is "sent" to FS during one cycle, but the result isn't obtained until the next cycle. But, because you aren't "storing" the answer "received" to an L:var, the request "sent" during the second cycle "cancels out" the answer "received..."

In simple terms, the same memory location is used for both the question and the answer!