Solved NullReferenceException in my plugin

Having a play, came across this issue, seems that it relates to the other hook issues or is this just a issue with my code? this worked fine (the hook for OnConsumeFuel) before i used Oxide.Core.Libraries.Covalence when i add Covalence and then the time check i get the error below, maybe its my code im not sure, thanks in advance for any assistance.

Code:

(02:11:44) | Failed to call hook 'OnConsumeFuel' on plugin 'LightsOut v1.0.0' (NullReferenceException: Object reference not set to an instance of an object)
(02:11:44) | at Oxide.Plugins.LightsOut.OnConsumeFuel (.BaseOven oven, .Item fuel, .ItemModBurnable burnable) [0x00000] in <filename unknown>:0
  at Oxide.Plugins.LightsOut.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (HookMethod method, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00000] in <filename unknown>:0

Protocol: 1995.145.1
Build Date: 07/03/2017 11:56:32
Unity Version: 5.6.0f3
Changeset: 21387
Branch: main
Oxide Version: 2.0.3355

Below works fine (no Oxide.Core.Libraries.Covalence refrence or TOD_Sky)

Code:

void OnConsumeFuel(BaseOven oven, Item fuel, ItemModBurnable burnable)
     {
          oven.StopCooking();        
     }

Then i add Oxide.Core.Libraries.Covalence and TOD_Sky with the below code and it fails

Code:

void OnConsumeFuel(BaseOven oven, Item fuel, ItemModBurnable burnable)
     {
          if (sky.Cycle.Hour < sky.SunriseTime)
              {
                    oven.StopCooking();
              } 
  
    }

Thanks kindly,
Console

 

Ok thanks kindly

 

wow thanks for TOD_Sky IsNight ....... that makes everything easier, simple.