Null exception

[Smokeynz]

@ kodiak or others who could ponder an issue.

We have been noticing after a mission is running for a while(it isnt consistant) we see a null exception error

System.NullReferenceException: Object reference not set to an instance of an object. at(blah blah CLOD code references)

I've been pondering if the reference is actually objects or lists of objects as Ai aircraft that are destroyed through despawner type methods. However the list reference is not completely cleared or purged from the system operating memory. Or if you have dual conditions to call a despawner, say at the completion of a path and time period, whre the object completes the path, the timer reference carries on and looks for the object when times up, and when the object does not exsist anymore and thus the exception.

The question is, is what I discribe a possibility, then if so, how do we purge the references. I was wondering if despawners should despawn the mission number they spawn in on.