Sometimes when I call

IComponent2.GetVisibility(3, new string[] { "configName" })[0]

( it gets the visibility state of the component in configuration "configName")

I get the return value -1.

What does it mean? There is no -1 listed in the documentation of the visibility values (swComponentVisibilityState_e Enumeration).

And when does it happen?

I have an assembly where the component that gives visibility -1...

- ...is a top level component

- ...is not suppressed

- ...has a real name, i.e. not "".

- ...has a real ID (get it via IComponent2.GetID()), i.e. the ID is not -1.

Unfortunately I cannot attach the model since it is owned by a customer.

Is there anyone who experienced this behaviour or knows something about this?