Mission Error

[Troll2k]

What is

system.null reference exception: object reference not set to an instance of an object.

and how do I fix it?

[FG28_Kodiak]

this message appears if you try to access a object that not exist.
To avoid it you can check for null value.

If( ... != null) // check for null value. Only executed if the object exist
{
// code
// ...
}