question

Have you checked the GUI log to see what's causing gui to crash?

Once you find the offending property or other error then try replacing it with a fixed value, then backtrack through all the properties until you find the error.

Cheers mate, I'll see what I can find.

Error seems to be-

 file:///opt/victronenergy/gui/qml/OverviewHub.qml:456:29: Property value set multiple times

line 456 is-

            right: dcSystemBox.left; rightMargin: -6

so I guess it won't let me create a flow connection over the top of an existing one.

That error typically means you have attempted to set the initial value of the same parameter more than once. IN this case, the line flagged is setting right and rightMargin so check for duplicated of this within the object.

Thanks Kevin.

I found a workaround which shows different flows with different coloured balls depending on a relay state. this actually displays better than my original idea so i'll stick with it.

I can now show orange balls from pv charger box to dc loads when my MPPT2 is diverting to my water heater, and blue balls when the MPPT is not diverting and the flow is from pv charger to battery.

    OverviewConnection {
  
        id: blueSolarChargerDcConnect
        ballCount: 3
        ballColor: relay2.value==1? "orange" : "#4789d0" //blue
        path: straight
        active: true //root.active && hasDcSolar
        value: -flow(sys.pvCharger.power)//backwards flow
        startPointVisible: false

        anchors {
            left: dcConnect.left
            top: dcConnect.top

            right: blueSolarCharger.right; rightMargin: 6
            bottom: dcConnect.top;
        }
    }

    OverviewConnection {
        id: batteryToDcSystem
        ballCount: 2
        ballColor: relay2.value==1? "orange" : "#4789d0" //blue
        path: straight
        active: root.active && hasDcSys.value > 0
        //value: flow(sys.dcSystem.power)
        value: flow(relay2.value==1 ? sys.pvCharger.power : sys.dcSystem.power )

                startPointVisible: false

        anchors {
            left: dcConnect.right
            top: dcConnect.top
            right: dcSystemBox.left; rightMargin: -6
            bottom: dcConnect.top
        }
    }