Bot keeps crashing

[Riverboa]

It's one of my bots that keeps crashing, the other run fine. That one bot runs fine the majority of the time aswell but crashes quite often. This is from the log when it crashes:

[00:59:16.371 D] System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generic.Dictionary`2.ValueCollection.Enumerator.MoveNext()
at Zeta.Internals.ActorManagerEx.
.
()
at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()
at Zeta.CommonBot.ItemManager.Refresh()
at Zeta.CommonBot.Logic.BrainBehavior.(Object )
at Zeta.TreeSharp.Action.RunAction(Object context)
at Zeta.TreeSharp.Action.
.
()
at Zeta.TreeSharp.Composite.Tick(Object context)
at Zeta.TreeSharp.PrioritySelector.
.
()
at Zeta.TreeSharp.Composite.Tick(Object context)
at Zeta.TreeSharp.Decorator.
.
()
at Zeta.TreeSharp.Composite.Tick(Object context)
at Zeta.TreeSharp.PrioritySelector.
.
()
at Zeta.TreeSharp.Composite.Tick(Object context)
at Zeta.Common.HookExecutor.Run(Object context)
at Zeta.TreeSharp.Action.RunAction(Object context)
at Zeta.TreeSharp.Action.
.
()
at Zeta.TreeSharp.Composite.Tick(Object context)
at Zeta.TreeSharp.PrioritySelector.
.
()
at Zeta.TreeSharp.Composite.Tick(Object context)
at Zeta.CommonBot.BotMain.
()
[00:59:16.371 N] Bot Thread Ended. Was this requested?

What does it mean?

 

[Tony]

http://www.thebuddyforum.com/honorb...-how-attach-your-hb-db-log-file-pictures.html