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.

Fabio