Try to execute them on the separate lines

? myCollection.Remove(-1)
? myCollection.Count 

>Within a very Complex program, i have this Collection bugs,
>they happen with a pseudo random frequency,
>but if the program do the same cycle,
>the occurrences are deterministic.
>
>

>myCollection.GetKey() return .T.
>myCollection.Item(existskey) return .T.
>myCollection(existskey) return .T.
>? myCollection.Remove(-1),myCollection.Count && output is .T.,104 ( or others not zero values )
>

>
>I have found a workaround:
>

>retry the operation another time
>

>but i'm not sure that this is a sure workaround.
>
>Result: Collection is not usable.
>
>I try to reduce the application for a simple repro code;
>a simple random test is not sufficient for a reproduction of the bugs.