Switch on sensor locking/freezing Gateway!!

[lagore]

I have a Veralite with a Gateway connected via serial with 1 sensor that has 1 relay, 1 switch and 2 temperature (ds18b20), this has been working very well for the last few weeks. I have just added another sensor with 2 relays 1 switch and 1 temperature, it uses almost identical code to the first and it works perfectly both in sending in the temperature and responding to relay changes from Vera until I use the switch this appears to freeze/lock the Gateway. Neither sensor can now communicate with the gateway. Rebooting the sensor does no good the Gateway has to be reset to get it all working. I am using v1.4, below is the sensor log with my comments in bold italic.
sensor started, id 3 Node startup
send: 3-3-0-0 s=255,c=0,t=17,pt=0,l=3,st=ok:1.4
send: 3-3-0-0 s=255,c=3,t=6,pt=1,l=1,st=ok:0
read: 0-0-3 s=255,c=3,t=6,pt=0,l=1:M
send: 3-3-0-0 s=255,c=3,t=11,pt=0,l=20,st=ok:Immersion Controller
send: 3-3-0-0 s=255,c=3,t=12,pt=0,l=3,st=ok:1.1
send: 3-3-0-0 s=0,c=0,t=6,pt=0,l=3,st=ok:1.4
send: 3-3-0-0 s=2,c=0,t=14,pt=0,l=3,st=ok:1.4
send: 3-3-0-0 s=4,c=0,t=14,pt=0,l=3,st=ok:1.4
send: 3-3-0-0 s=2,c=1,t=22,pt=0,l=3,st=ok:Off Programmed message to set relay off in Vera on node startup
send: 3-3-0-0 s=4,c=1,t=22,pt=0,l=3,st=ok:Off
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9 Temperature sent to Vera
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
read: 0-0-3 s=2,c=1,t=22,pt=0,l=6:HeatOn Relay switched on from VERA
send: 3-3-0-0 s=2,c=1,t=22,pt=0,l=6,st=ok:HeatOn
Switching Main Immersion ON
Incoming change for sensor:2
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
read: 0-0-3 s=4,c=1,t=22,pt=0,l=6:HeatOn Relay switched on from VERA
send: 3-3-0-0 s=4,c=1,t=22,pt=0,l=6,st=ok:HeatOn
Switching Ensuite Immersion ON
Incoming change for sensor:4
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
read: 0-0-3 s=2,c=1,t=22,pt=0,l=3:Off Relay switched off from VERA
send: 3-3-0-0 s=2,c=1,t=22,pt=0,l=3,st=ok:Off
Switching Main Immersion OFF
Incoming change for sensor:2
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
read: 0-0-3 s=4,c=1,t=22,pt=0,l=3:Off Relay switched off from VERA
send: 3-3-0-0 s=4,c=1,t=22,pt=0,l=3,st=ok:Off
Switching Ensuite Immersion OFF
Incoming change for sensor:4
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9 Temperature fail sending to Vera
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9 but next send is good
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=ok:16.9
send: 3-3-0-0 s=2,c=1,t=22,pt=0,l=6,st=fail:HeatOn Request relay on from switch on node, all messages fail from here
Switch:
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
send: 3-3-255-255 s=255,c=3,t=7,pt=0,l=0,st=fail:
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
sensor started, id 3 Node restarted but unable to communicate with Gateway
send: 3-3-0-0 s=255,c=0,t=17,pt=0,l=3,st=fail:1.4
send: 3-3-0-0 s=255,c=3,t=6,pt=1,l=1,st=fail:0
send: 3-3-0-0 s=255,c=3,t=11,pt=0,l=20,st=fail:Immersion Controller
send: 3-3-0-0 s=255,c=3,t=12,pt=0,l=3,st=fail:1.1
send: 3-3-0-0 s=0,c=0,t=6,pt=0,l=3,st=fail:1.4
send: 3-3-0-0 s=2,c=0,t=14,pt=0,l=3,st=fail:1.4
send: 3-3-0-0 s=4,c=0,t=14,pt=0,l=3,st=fail:1.4
send: 3-3-255-255 s=255,c=3,t=7,pt=0,l=0,st=fail:
send: 3-3-0-0 s=2,c=1,t=22,pt=0,l=3,st=fail:Off
send: 3-3-0-0 s=4,c=1,t=22,pt=0,l=3,st=fail:Off
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9
send: 3-3-0-0 s=0,c=1,t=0,pt=7,l=5,st=fail:16.9

The code that handles the switch is from the examples.

    gw.process();
    debouncer.update();
    // Get the update value
    int value = debouncer.read();
    if (value != oldValue && value==0) 
    {
        //gw.send(msg_MAIN_Relay.set(state?false:true), true); // Send new state and request ack back
        if (HeaterOn)        //the heater is on so switch it off.
        {
            gw.send(msg_MAIN_Relay.set("Off"),true);
            Serial.print("Switch: ");
            Serial.println(msgSwitch.getString());
        } 
        else                //the heater is off so switch it off
        {
            gw.send(msg_MAIN_Relay.set("HeatOn"),true);
            Serial.print("Switch: ");
            Serial.println(msgSwitch.getString());
        }
    }
    oldValue = value; ````
Is there any way to read the debug info from the Gateway when it is connected to the Vera via a serial link