By default, the interactive users of the PI Connection Manager Dialog are not allowed to directly open Collective member servers due to possible adverse effects to the host applications. However, the hosting applications can reverse this setting by using the AllowCollectiveMemberOpen method.
WHEN TO USE THE ALLOWCOLLECTIVEMEMBEROPEN METHOD
In most cases application should not enable direct member connections because the main collective object/server will be disconnected while members are open. This method was designed for diagnostics and other special purpose applications.