Debugging a problem with the PatchedConicRenderer?

[Guest]

I know my code caused this but I can't find the direct cause because it happens outside of my code execution chain.

NullReferenceException: Object reference not set to an instance of an object
  at PatchedConicRenderer.OnGUI () [0x00000] in <filename unknown>:0 

(Filename:  Line: -1)

Is there any way to figure out what might be happening here?

[Faark]

Hm, don't think there is a good way to "debug" anything within KSP. I really wished they would offer a dev build, so we could attach unities mono-develop to it. Maybe KerbalKon is a good opportunity to ask for it! Anyway, you could dump lot of its variables and check for null values... but that requires a lot of effort. In what way is your plugin manipulating this KSP module? Maybe checking out those related objects and comparing them to well working ones does the job?

[pizzaoverhead]

As it's the PatchedConicRenderer's OnGUI method that's having issues, I'm guessing that you have an OnGUI method that has left things in an invalid state somehow, and PatchedConicRenderer is the first thing to hit it. I would start looking there. Try adding a second KSPAddon class that also calls OnGUI so that the failure happens in code you control.

[Guest]

I only have a tiny bit of code that executes outside of OnGUI() and I just fixed a layout issue I was having when this popped up. I figured out last night that the issue happens when I update the flight plan after changing a maneuver node while I have an encounter but I can't, for the life of me, figure out why that is happening because I don't delete anything SQUAD set and I'm not creating new maneuver node gizmos.

I think Faark is right, it's time to dump variables. Thanks for the hints.

[blizzy78]

You could always post your source code here - that could help.

[Guest]

You could always post your source code here - that could help.

I'm about to start my commute If I'm still having issues later tonight I'll get it all up on Github and post a link.